Medium 6.9Published Sep 28, 2026

CVE-2026-101900Axios: Fetch Adapter Header Injection via Inherited FormData getHeaders

Updated under an hour ago (2026-10-19 10:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Axios is a promise-based HTTP client for the browser and Node.js. From 1.12.0 until 1.20.0, ResolveConfig reads inherited Symbol.toStringTag, append, and getHeaders properties while resolving FormData headers. A separate same-process prototype-pollution flaw supplies an array or non-plain class instance whose inherited properties make it appear FormData-like; plain objects are blocked. The inherited getHeaders function can return attacker-controlled headers that resolveConfig merges into a fetch adapter request. Attacker-controlled headers can alter authorization, cache, metadata-service, or application-specific request behavior. This issue is fixed in version 1.20.0.

CVSS: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N
Weakness (CWE): CWE-74, CWE-693, CWE-1321
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

axios axios axios:axios (from the name)	from 1.12.0, < 1.20.0	CNA record

References

https://github.com/axios/axios/security/advisories/GHSA-4hqw-qxg8-jxx2x-refsource-confirm
https://github.com/axios/axios/pull/11141x-refsource-misc
https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39ax-refsource-misc
https://github.com/axios/axios/releases/tag/v1.20.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.