{"id":"CVE-2026-44489","aliases":["GHSA-654m-c8p4-x5fp"],"url":"https://o3.security/vulnerability/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.","published":"2026-06-11T15:30:44.798Z","modified":"2026-08-12T03:51:40.964332919Z","cvss":{"score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.00228,"percentile":0.13811,"asOf":"2026-08-20"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"axios","fixedVersion":"1.16.0"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:40.964332919Z"}}