{"id":"CVE-2026-55501","aliases":["GHSA-7cfm-pqrj-xgq7"],"url":"https://o3.security/vulnerability/CVE-2026-55501","summary":"9router: Login brute-force protection bypass via spoofed X-Forwarded-For header","details":"9Router is an AI router & token saver. Prior to 0.4.80, the dashboard login rate limiter in src/lib/auth/loginLimiter.js derives the client identity from the attacker-controlled X-Forwarded-For HTTP header, and src/app/api/auth/login/route.js uses that spoofable value for checkLock and recordFail. A remote attacker can rotate the X-Forwarded-For value on each login attempt to receive a fresh rate-limit bucket, bypass the 5-attempt threshold and progressive lockout durations, and perform unlimited brute-force attempts against the dashboard password. This issue is fixed in version 0.4.80.","published":"2026-07-10T15:23:53.709Z","modified":"2026-08-12T03:51:45.082106684Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":{"score":0.0032,"percentile":0.24905,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"9router","fixedVersion":"0.4.77"}],"fix":{"url":"https://github.com/decolua/9router/commit/7648c3412b403a29f04967c4b4e9725e228791d4","label":"decolua/9router@7648c34"},"references":[{"type":"WEB","url":"https://github.com/decolua/9router/releases/tag/v0.4.80"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55501.json"},{"type":"ADVISORY","url":"https://github.com/decolua/9router/security/advisories/GHSA-7cfm-pqrj-xgq7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55501"},{"type":"FIX","url":"https://github.com/decolua/9router/commit/7648c3412b403a29f04967c4b4e9725e228791d4"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:45.082106684Z"}}