{"id":"CVE-2026-101900","published":"2026-09-28T18:17:18.050","lastModified":"2026-09-28T18:17:18.050","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-74","CWE-693","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-4hqw-qxg8-jxx2","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-4hqw-qxg8-jxx2","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-4hqw-qxg8-jxx2","tags":[]},{"url":"https://github.com/axios/axios/security/advisories/GHSA-4hqw-qxg8-jxx2","tags":[]}],"hasPoc":true,"ai":null}