{"id":"CVE-2026-44489","summary":"Axios: Proxy-Authorization Header Injection via Prototype Pollution — Incomplete Null-Prototype Fix","details":"Axios is a promise based HTTP client for the browser and Node.js. From 1.15.2 to before 1.16.0, nested objects created by utils.merge() (e.g., config.proxy) are still constructed as plain {} with Object.prototype in their chain. The setProxy() function at lib/adapters/http.js:209-223 reads proxy.username, proxy.password, and proxy.auth without hasOwnProperty checks. When Object.prototype.username is polluted, setProxy() constructs a Proxy-Authorization header with attacker-controlled credentials and injects it into every proxied HTTP request. This vulnerability is fixed in 1.16.0.","aliases":["GHSA-654m-c8p4-x5fp"],"modified":"2026-07-15T01:48:52.151407615Z","published":"2026-06-11T15:30:44.798Z","related":["CGA-7vg9-5766-fmwh"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-113","CWE-1321"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44489.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44489.json"},{"type":"ADVISORY","url":"https://github.com/axios/axios/security/advisories/GHSA-654m-c8p4-x5fp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44489"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/axios/axios","events":[{"introduced":"582934382e4e0e0bcb679c628071a4203e93cf57"},{"last_affected":"582934382e4e0e0bcb679c628071a4203e93cf57"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_STRING"],"cpe":"cpe:2.3:a:axios:axios:1.15.2:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"1.15.2"},{"last_affected":"1.15.2"}]}}],"versions":["1.15.2","v1.15.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44489.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}