{"id":"CVE-2026-85725","title":"LightRAG provides simple and fast retrieval-augmented generation","summary":"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 th…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-208"],"vendor":"HKUDS","product":"LightRAG","affected":["LightRAG < 1.5.5"],"patched":["lightrag-hku 1.5.5"],"published":"2026-09-22","updated":"2026-09-26","sourceUpdated":"2026-09-26T00:16:37.513","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85725","references":[{"url":"https://github.com/HKUDS/LightRAG/commit/89849c3ed0e0380345a6b5bade027cfb9a5bf32c","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/pull/3423","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","label":"security-advisories@github.com"},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-c759-cx9p-mrwq","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85725"},{"url":"https://github.com/advisories/GHSA-c759-cx9p-mrwq"},{"url":"https://github.com/HKUDS/LightRAG"},{"url":"https://pypi.org/project/lightrag-hku"}],"tags":["nvd","cve.org","exploit-available","ghsa","pip","osv"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-25T23:42:45.536883Z"},"epss":0.00446,"epssPercentile":0.38611,"aliases":["GHSA-c759-cx9p-mrwq","PYSEC-2026-4061"],"ecosystem":"pip","ingestedAt":"2026-09-22T17:07:07.384Z","slug":"CVE-2026-85725","body":"## Overview\n\nLightRAG 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-85725)\n\nAffected packages:\n\n- `lightrag-hku <= 1.5.4`\n\nPatched in:\n\n- `lightrag-hku 1.5.5`\n\nSource: https://github.com/advisories/GHSA-c759-cx9p-mrwq","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":211219,"id":"CVE-2026-85725","ts":1790382261721,"field":"exploit_available","old":"false","new":"true"}]}