HighCVE-2026-25639

Axios affected by Denial of Service via proto Key in mergeConfig (CVE-2026-25639)

Published 09.02.2026Last modified 10.09.2026Sources: BSI, Red Hat, CVE.org, OSV

Actively exploited
Source: VulnCheck KEV (opens in a new tab) How we classify

What is affected, what to do

A denial of service flaw has been discovered in the Axios npm package. the mergeConfig function in axios crashes with a TypeError when processing configuration objects containing __proto__ as an own property. An attacker can trigger this by providing a malicious configuration object created via JSON.parse(), causing complete denial of service.

The vulnerability is being actively exploited; treat it as a priority. Update Axios to version 0.30.3.

Affected: Axios gte 1.0.0, < 1.13.5..*
Axios lt *..0.30.3
Fixed in: Axios 0.30.3

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: BSI, Red Hat, CVE.org, OSV

2.8 %

EPSS score

Moderate — model estimates 1-10% exploitation likelihood.

Source: FIRST EPSS, percentile 86.4

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: 111.43 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: actively exploitedSource: VulnCheck KEV (opens in a new tab) How we classify
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: 2.8 %; 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: 86.4; Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
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: 09.02.2026
CISA assessment (SSVC): Exploitation: none known · automatable · Technical impact: partial; Source: CISA Vulnrichment, as of 10 February 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-754

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: Actively exploited: treat the vulnerability as a priority in vulnerability handling under Art. 21(2)(e) NIS2. If it is exploited in your environment, check the reporting obligation under Art. 23 (early warning within 24 hours).
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: Since 11.09.2026, manufacturers of affected products with digital elements must report actively exploited vulnerabilities under Art. 14 CRA, with an early warning within 24 hours via ENISA's single reporting platform.
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

Source: BSI WID Portal, BSI CSAF, redhat_csaf, cvelistv5, NVD (NIST), CVE.org (MITRE), OSV (Open Source Vulnerabilities)

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
axios	axios	`≥ 1.0.0, < 1.13.5` `< 0.30.3` `1.0.0 – < 1.13.5` `< 0.30.3`	— `0.30.3` `1.13.5` `0.30.3`
HCL	BigFix	`WebUI`	—
IBM	Concert	`< 3.0.0`	`3.0.0`
IBM	Rational Build Forge	`< 8.0.0.30`	`8.0.0.30`
Oracle	PeopleSoft	`9.2` `9.1` `8.61-8.63`	— — —
Red Hat	OpenShift	`Service Mesh 3.2` `Service Mesh 3.0` `Migration Toolkit for Containers` `Service Mesh 3.1`	— — — —

Vendors and products

Weakness classes (CWE)

CWE-754Improper Check for Unusual or Exceptional Conditions
Class
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
Entry at MITRE CWE-754

References & sources

github.comaxios/axios/security/advisories/GHSA-43fc-jf86-j433web, x_refsource_CONFIRM
NVD (NIST)vuln/detail/CVE-2026-25639advisory
github.comaxios/axios/pull/7369web, x_refsource_MISC
github.comaxios/axios/pull/7388web, x_refsource_MISC
github.comaxios/axios/commit/28c721588c7a77e7503d0a434e016f852c597b57web, x_refsource_MISC
github.comaxios/axios/commit/d7ff1409c68168d3057fc3891f911b2b92616f9eweb, x_refsource_MISC
github.comaxios/axiospackage
github.comaxios/axios/releases/tag/v0.30.3web, x_refsource_MISC
github.comaxios/axios/releases/tag/v1.13.5web, x_refsource_MISC
access.redhat.comsecurity/cve/CVE-2026-25639Vulnerability database, x_refsource_REDHAT
bugzilla.redhat.comRHBZ#2438237Issue tracking, x_refsource_REDHAT
security.access.redhat.comdata/csaf/v2/vex/2026/cve-2026-25639.jsonx_sadp-csaf-vex
access.redhat.comerrata/RHSA-2026:6277Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:6428Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:41064Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:5633Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:8229Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:36882Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:13548Vendor advisory, x_refsource_REDHAT
access.redhat.comerrata/RHSA-2026:6308Vendor 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).

10.09.2026Record 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)	added	—	Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/25xxx/CVE-2026-25639.json">CVE-2026-25639</a>