{"id":"CVE-2026-85725","published":"2026-09-22T17:17:27.203","lastModified":"2026-09-26T00:16:37.513","description":"LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, verify_password in lightrag/api/passwords.py compares plaintext AUTH_ACCOUNTS password values with Python's == operator. The comparison can return after the first mismatching byte, creating response-time differences based on password length and matching prefixes. A network attacker with sufficiently low-latency access can repeatedly query the /login endpoint and use the timing oracle to recover a plaintext-configured password character by character. Deployments using bcrypt-prefixed password values are not affected by this comparison path. This issue is fixed in version 1.5.5.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-208"],"vendors":[],"products":[],"references":[{"url":"https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32c","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/pull/3423","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","tags":[]}],"exploitRefs":[{"url":"https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32c","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/pull/3423","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","tags":[]}],"hasPoc":true,"ai":null}