{"cve":"CVE-2026-85725","nvd":{"published":"2026-09-22T17:17:27.203","modified":"2026-09-26T00:16:37.513","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-208"],"references":["https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32c","https://github.com/HKUDS/LightRAG/pull/3423","https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:02.509636177+00:00"},"epss":{"cve":"CVE-2026-85725","score":0.00446,"percentile":0.38808,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-c759-cx9p-mrwq","url":"https://osv.dev/vulnerability/GHSA-c759-cx9p-mrwq","summary":"lightrag-hku: Plaintext Passwords Compared Without Constant-Time Function","modified":"2026-10-01T17:55:55.036612025Z","packages":[{"ecosystem":"PyPI","name":"lightrag-hku","purl":"pkg:pypi/lightrag-hku","ranges":["<1.5.5"],"fixed":["1.5.5"]}]},{"id":"PYSEC-2026-4061","url":"https://osv.dev/vulnerability/PYSEC-2026-4061","summary":"lightrag-hku: Plaintext Passwords Compared Without Constant-Time Function","modified":"2026-10-01T17:45:03.126468924Z","packages":[{"ecosystem":"PyPI","name":"lightrag-hku","purl":"pkg:pypi/lightrag-hku","ranges":["<1.5.5"],"fixed":["1.5.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}