{"id":"CVE-2026-85725","summary":"LightRAG: Plaintext Passwords Compared Without Constant-Time Function","details":"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.","aliases":["GHSA-c759-cx9p-mrwq"],"modified":"2026-09-23T03:47:29.925371195Z","published":"2026-09-22T16:16:36.326Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-208"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85725.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85725.json"},{"type":"FIX","url":"https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32c"},{"type":"FIX","url":"https://github.com/HKUDS/LightRAG/pull/3423"},{"type":"WEB","url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5"},{"type":"ADVISORY","url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85725"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hkuds/lightrag","events":[{"introduced":"0"},{"fixed":"22ea2d0cbfa2b7002aa118bd0bf1780a69d489bc"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.5.5"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.5.5rc1","v1.5.4","temp","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.5.0rc3","v1.5.0rc2","v1.4.9.1","v1.4.16","v1.4.15","v1.4.14","v1.4.13","v1.4.13rc1","v1.4.12","v1.4.12rc1","v1.4.11","v1.4.11rc1","v1.4.11rc2","v1.4.10","v1.4.9.11","v1.4.9.10","v1.4.9.9","v1.4.9.8","v1.4.9.7","v1.4.9.6","v1.4.9.5","v1.4.9.4","v1.4.9.4rc1","v1.4.9.3","v1.4.9.2","v1.4.9","v1.4.9rc4","v1.4.9rc3","v1.4.9rc2","v1.4.9rc1","v1.4.8.2","v1.4.8.1","v1.4.8","v1.4.8rc9","v1.4.8rc8","v1.4.8rc5","v1.4.8rc4","v1.4.8rc3","v1.4.8rc1","v1.4.7","v1.4.7rc2","v1.4.6","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.10","v1.3.9","v1.3.8","v1.3.7","v1.3.6","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.9","v1.2.8","v1.2.7","v1.2.6","v1.2.5","v1.2.3","v1.2.2","v1.2.1","v1.1.12","v1.1.11","v1.1.10","v1.1.9","v1.1.8","v1.1.7","v1.1.6","v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.9","v1.0.8","v1.0.7","v1.0.6","v1.0.5"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-85725.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}