{"id":"CVE-2026-101908","revision":"bce7b23074574d769bdbcf2ba4cf8e60","records":[{"revision":"bce7b23074574d769bdbcf2ba4cf8e60","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-101908","aliases":[],"title":"Axios: Prototype pollution gadget in fetch adapter can alter outbound requests","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.","state":0,"publishedAt":"2026-09-28T17:38:55.303+00:00","modifiedAt":"2026-09-28T18:15:41.687+00:00","affected":[{"ecosystem":"Vendor product","name":"axios","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"axios\",\n                    \"product\": \"axios\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.7.0, < 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-vh66-26gq-q6x8","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-2026-101908","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101908","identifiers":["CVE-2026-101908"]},"retained":false,"historicalAffected":[]}],"coverage":[]}