CriticalCVE-2026-39821

Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna (CVE-2026-39821)

Published 22.05.2026Last modified 17.09.2026Sources: SUSE, Red Hat, OSV, Ubuntu, Msrc Update Guide, CVE.org, EUVD, BSI

What is affected, what to do

Update Go standard library Net/http to version 1.25.13, Go standard library Net/http to version 1.26.6, Go standard library Net/http to version 1.27.0-rc.3.

Affected: Go standard library Net/http lt *..1.25.13
Go standard library Net/http lt 1.26.0-0..1.26.6
Go standard library Net/http lt 1.27.0-0..1.27.0-rc.3
Go standard library Net/http/internal/http2 lt *..1.25.13
Go standard library Net/http/internal/http2 lt 1.26.0-0..1.26.6
Go standard library Net/http/internal/http2 lt 1.27.0-0..1.27.0-rc.3
Golang.org/x/net/idna lt *..0.55.0
Fixed in: Go standard library Net/http 1.25.13
Go standard library Net/http 1.26.6
Go standard library Net/http 1.27.0-rc.3
Go standard library Net/http/internal/http2 1.25.13
Go standard library Net/http/internal/http2 1.26.6
Go standard library Net/http/internal/http2 1.27.0-rc.3
Golang.org/x/net/idna 0.55.0

Not sure whether and how you are affected? Ask a question about this vulnerability

Metrics

10.0

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: Vendor (CNA), CVSS v3

10.0

CVSS v3

Severity Critical on the scale from 0 to 10.

Source: SUSE, Red Hat, OSV, Ubuntu, Msrc Update Guide, CVE.org, EUVD, BSI

1.8 %

EPSS score

Moderate — model estimates 1-10% exploitation likelihood.

Source: FIRST EPSS, percentile 78.8

Show all metrics

Severity: Critical
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 117.49 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: no public PoC known
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 10.0 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 10.0
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 1.8 %; Moderate — model estimates 1-10% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 78.8; High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 22.05.2026

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.

Source: suse_csaf, redhat_csaf, OSV (Open Source Vulnerabilities), Ubuntu Security Notices, Microsoft Security Update Guide, cvelistv5, NVD (NIST), CVE.org (MITRE), ENISA EUVD, BSI WID Portal, BSI CSAF

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Go standard library	net/http	`< 1.25.13` `1.26.0-0 – < 1.26.6` `1.27.0-0 – < 1.27.0-rc.3`	`1.25.13` `1.26.6` `1.27.0-rc.3`
Go standard library	net/http/internal/http2	`1.27.0-0 – < 1.27.0-rc.3` `< 1.25.13` `1.26.0-0 – < 1.26.6`	`1.27.0-rc.3` `1.25.13` `1.26.6`
golang.org/x/net	golang.org/x/net/idna	`< 0.55.0`	`0.55.0`
golang	net	`< 0.55.0`	`0.55.0`
Golang	Go	`< 1.25.13` `< 1.26.6`	`1.25.13` `1.26.6`
Golang	Go net module	`< 0.55.0`	`0.55.0`
Oracle	Solaris	`<11.3 ESU 36.36` `<11.4 SRU 94`	— —
go	golang.org/x/net	`—`	—
go	stdlib	`1.27.0-0` `1.26.0-0`	— —

Vendors and products

References & sources

go.devcl/767220fix
go.devissue/78760report
groups.google.comg/golang-announce/c/iI-mYSI0lu8web
pkg.go.devvuln/GO-2026-5026
access.redhat.comsecurity/cve/CVE-2026-39821Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2480756Issue tracking, x_refsource_REDHAT
security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-39821.jsonx_sadp-csaf-vex
access.redhat.comerrata/RHSA-2026:42079Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42080Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:41019Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42078Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:34789Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42082Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:36796Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42150Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42151Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:42240Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:30855Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:46395Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:37436Vendor advisory, x_refsource_REDHAT

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

17.09.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65851
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:68504

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

15.09.2026Record modifiedRed Hat ADP

New references:

Show 5 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:66350
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67287
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67319
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67517

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

14.09.2026Record modifiedRed Hat ADP

New references:

Show 4 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67149
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67159
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:67160

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

11.09.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:66022
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:66432

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

10.09.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:62549
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:66016

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Show 24 older changes

09.09.2026Record modifiedRed Hat ADP

New references:

and 1 more reference

Show 6 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65126
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65153
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65359
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65534
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:65886

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

07.09.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:63134

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:63134

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

31.08.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:61245
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:61253

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

28.08.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:60520

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/39xxx/CVE-2026-39821.json">CVE-2026-39821</a>
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:60520

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

25.08.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+427)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+427)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

24.08.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+427)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+427)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

21.08.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:57541

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:57541
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+426)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+427)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

20.08.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:57194

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:57194
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+404)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+426)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

19.08.2026Record modifiedRed Hat ADP

New references:

and 1 more reference

Show 6 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:54580
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:56143
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:56223
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:56340
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:56431
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+402)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+404)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

18.08.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+402)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+402)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

11.08.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:52826
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:53374
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+387)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+395)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

10.08.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+387)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+387)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

06.08.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:50843
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:51033
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+382)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+384)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

05.08.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:50300

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:50300
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+382)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

04.08.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

03.08.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

31.07.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

30.07.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:47952

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:47952
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+380)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+381)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

28.07.2026Record modifiedRed Hat ADP

1 individual change: Affected versions (publisher)

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+377)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+378)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

27.07.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:44622
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:46395
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+376)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+377)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

24.07.2026Record modifiedRed Hat ADP

New references:

https://access.redhat.com/errata/RHSA-2026:44624

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:44624
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+369)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+376)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

23.07.2026Record modifiedRed Hat ADP

New references:

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:43052
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:43692
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+369)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+369)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

22.07.2026Record modifiedRed Hat ADP

New references:

Show 4 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42796
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42852
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:43038
Affected versions (publisher)	changed	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+367)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+369)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

21.07.2026Record modifiedRed Hat ADP

New references:

and 8 more references

Show 19 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:41928
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42043
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42047
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42048
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42049
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42050
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42051
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42078
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42079
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42080
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42082
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42132
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42142
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42146
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42150
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42151
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42240
Reference	added	—	https://access.redhat.com/errata/RHSA-2026:42644
Affected versions (publisher)	changed	Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+352)	Red Hat Ansible Automation Platform 2.5 for RHEL 8, Red Hat Ansible Automation Platform 2.5 for RHEL 9, Red Hat Ansible Automation Platform 2.6 for RHEL 10 (+367)

Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

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Linked advisories

Fwd: @RISK®: The Consensus Security Vulnerability Alert: Vol. 26, Num. 21SANS @RISK28.05.2026

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<a href="https://intel.neosec.eu/en/cve/CVE-2026-39821"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-39821.svg?lang=en" alt="CVE-2026-39821 – NEOSEC Intel" height="20"></a>