{"id":"CVE-2026-101908","published":"2026-09-28T18:17:19.440","lastModified":"2026-09-28T19:16:48.390","description":"Axios is a promise-based HTTP client for the browser and Node.js. From 1.7.0 until 1.20.0, the fetch adapter constructs a Request with sanitized resolvedOptions but then calls fetch with the original fetchOptions. A separate same-process prototype-pollution flaw populates Object.prototype.headers so fetchOptions.headers resolves through inheritance. The inherited fetchOptions.headers value overrides the sanitized Request headers through the second argument to fetch after Request construction. Attacker-controlled request headers can alter authorization, caching, metadata-service access, or application-specific behavior. This issue is fixed in version 1.20.0.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-1321"],"vendors":[],"products":[],"references":[{"url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","tags":[]},{"url":"https://github.com/axios/axios/pull/11141","tags":[]},{"url":"https://github.com/axios/axios/releases/tag/v1.20.0","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-vh66-26gq-q6x8","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-vh66-26gq-q6x8","tags":[]}],"exploitRefs":[{"url":"https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","tags":[]},{"url":"https://github.com/axios/axios/pull/11141","tags":[]},{"url":"https://github.com/axios/axios/releases/tag/v1.20.0","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-vh66-26gq-q6x8","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-vh66-26gq-q6x8","tags":[]}],"hasPoc":true,"ai":null}