CVE-2026-25639

CVE-2026-25639 is a high-severity vulnerability in Axios with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-754.

Key facts

Description

Axios is a promise based HTTP client for the browser and Node.js. Prior to versions 0.30.3 and 1.13.5, 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. This vulnerability is fixed in versions 0.30.3 and 1.13.5.

Frequently asked questions

What is CVE-2026-25639?
Axios is a promise based HTTP client for the browser and Node.js. Prior to versions 0.30.3 and 1.13.5, 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. This vulnerability is fixed in versions 0.30.3 and 1.13.5.
How severe is CVE-2026-25639?
CVE-2026-25639 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-25639 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25639?
CVE-2026-25639 affects Axios. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25639?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25639 have an EU (EUVD) identifier?
Yes. CVE-2026-25639 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6850.
When was CVE-2026-25639 published?
CVE-2026-25639 was published on 2026-02-09 and last updated on 2026-07-01.

References

Affected products (1)

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Threat intelligence

Threat-intel indicators referencing this CVE: