{"id":"CVE-2026-101900","revision":"e7bb5dfc36ac49919e4c544845ba3614","records":[{"revision":"e7bb5dfc36ac49919e4c544845ba3614","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-101900","aliases":[],"title":"Axios: Fetch Adapter Header Injection via Inherited FormData getHeaders","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.","state":0,"publishedAt":"2026-09-28T17:14:07.108+00:00","modifiedAt":"2026-09-28T17:49:13.106+00:00","affected":[{"ecosystem":"Vendor product","name":"axios","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"axios\",\n                    \"product\": \"axios\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.12.0, < 1.20.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6.9,"severity":"MEDIUM"}],"references":["https://github.com/axios/axios/security/advisories/GHSA-4hqw-qxg8-jxx2","https://github.com/axios/axios/pull/11141","https://github.com/axios/axios/commit/d19040bda7a8be2f82c3c6e1a5bc03917daee39a","https://github.com/axios/axios/releases/tag/v1.20.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101900","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101900","identifiers":["CVE-2026-101900"]},"retained":false,"historicalAffected":[]}],"coverage":[]}