Go JOSE affect by a panic in JWE decryption (CVE-2026-34986)
Published Last modified Sources: Red Hat, SUSE, BSI, CVE.org, OSV
What is affected, what to do
A flaw was found in Go JOSE, a library for handling JSON Web Encryption (JWE) objects. A remote attacker could exploit this vulnerability by providing a specially crafted JWE object.
Update Go-jose to version 3.0.5.
- Affected
- Go-jose
gte 4.0.0, < 4.1.4..* - Go-jose
lt *..3.0.5
- Go-jose
- Fixed in
- Go-jose
3.0.5
- Go-jose
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
7.5
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
7.5
CVSS v3
Severity High on the scale from 0 to 10.
Source: Red Hat, SUSE, BSI, CVE.org, OSV
0.7 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 51.1
Show all metrics
- Severity
- High
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- 74.31 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- 7.5 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- 7.5
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- 0.7 %
- Low — model estimates < 1% 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- 51.1
- 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
- CISA assessment (SSVC)
- Exploitation: none known · automatable · Technical impact: partial
- Source: CISA Vulnrichment, as of 7 April 2026
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-248, CWE-131
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 Go JOSE, a library for handling JSON Web Encryption (JWE) objects. A remote attacker could exploit this vulnerability by providing a specially crafted JWE object. When decrypting such an object, if a key wrapping algorithm is specified but the encrypted key field is empty, the application can crash. This leads to a denial of service (DoS), making the affected service unavailable to legitimate users.
Source: redhat_csaf, suse_csaf, BSI WID Portal, BSI CSAF, NVD (NIST), OSV (Open Source Vulnerabilities), CVE.org (MITRE), cvelistv5
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| go-jose | go-jose |
|
|
| go-jose_project | go-jose |
|
|
| Red Hat | Enterprise Linux |
|
|
| Red Hat | Enterprise Linux Cryostat |
|
|
| Red Hat | OpenShift |
|
|
| Red Hat | OpenShift Container Platform |
|
|
| Red Hat | OpenShift GitOps |
|
|
| Splunk | Splunk Enterprise |
|
|
Vendors and products
Weakness classes (CWE)
CWE-248Uncaught Exception
Base
An exception is thrown from a function, but it is not caught.
Entry at MITRE CWE-248CWE-131Incorrect Calculation of Buffer Size
Base
The product does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
Entry at MITRE CWE-131
References & sources
- github.comgo-jose/go-jose/security/advisories/GHSA-78h2-9frx-2jm8advisory, x_refsource_CONFIRM, Mitigation, Vendor advisory
- pkg.go.devgithub.com/go-jose/go-jose/v4web, x_refsource_MISC, Product, Technical description
- access.redhat.comsecurity/cve/CVE-2026-34986Vulnerability database, x_refsource_REDHAT
- bugzilla.redhat.comRHBZ#2455470Issue tracking, x_refsource_REDHAT
- security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-34986.jsonx_sadp-csaf-vex
- access.redhat.comerrata/RHSA-2026:17789Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:20569Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:19719Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:27856Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:17040Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:16696Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:22937Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:19135Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:22450Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:19017Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:33722Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:35833Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:48790Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:49944Vendor advisory, x_refsource_REDHAT
- access.redhat.comerrata/RHSA-2026:25252Vendor 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).
Record 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) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/34xxx/CVE-2026-34986.json">CVE-2026-34986</a>Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:65838Reference added —https://access.redhat.com/errata/RHSA-2026:65906Reference added —https://access.redhat.com/errata/RHSA-2026:66385Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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/2026/34xxx/CVE-2026-34986.json">CVE-2026-34986</a>Reference added —https://access.redhat.com/errata/RHSA-2026:62548Reference added —https://access.redhat.com/errata/RHSA-2026:62550Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/34xxx/CVE-2026-34986.json">CVE-2026-34986</a>Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/34xxx/CVE-2026-34986.json">CVE-2026-34986</a>Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Show 23 older changes
Record modifiedRed Hat ADP
New references:Show the original change
Individual changes of this event as published by NVD Type Action Before After Reference added —https://access.redhat.com/errata/RHSA-2026:60452Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
New references: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-2026:57590Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:56968Reference added —https://access.redhat.com/errata/RHSA-2026:57013Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+500)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:54602Reference added —https://access.redhat.com/errata/RHSA-2026:56366Reference added —https://access.redhat.com/errata/RHSA-2026:56431Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
New references: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-2026:51033Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+474)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+475)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
New references: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-2026:48676Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+473)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+474)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
New references: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-2026:49944Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+471)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+473)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
New references: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-2026:48790Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+471)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+471)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+471)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+471)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:47952Reference added —https://access.redhat.com/errata/RHSA-2026:48085Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+469)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+471)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:44267Reference added —https://access.redhat.com/errata/RHSA-2026:46885Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+469)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:41928Reference added —https://access.redhat.com/errata/RHSA-2026:41941Reference added —https://access.redhat.com/errata/RHSA-2026:41944Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record 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 Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10 (+468)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
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-2026:34099Reference added —https://access.redhat.com/errata/RHSA-2026:36820Affected versions (publisher) changed Cryostat 4 on RHEL 9, Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10) (+101)Cryostat 4 on RHEL 9, Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10) (+101)Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Record modifiedRed Hat ADP
New references:Show the original change
Individual changes of this event as published by NVD Type Action Before After Reference added —https://access.redhat.com/errata/RHSA-2026:35833Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
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<a href="https://intel.neosec.eu/en/cve/CVE-2026-34986"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-34986.svg?lang=en" alt="CVE-2026-34986 – NEOSEC Intel" height="20"></a>