{"id":"CVE-2026-85734","published":"2026-09-22T17:17:27.367","lastModified":"2026-09-22T18:17:23.530","description":"LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.5, the POST /login endpoint in lightrag/api/lightrag_server.py does not impose a rate limit, account lockout, delay, or counter for failed authentication attempts. A network attacker can submit password guesses at full request speed until a valid account password is found. Successful credential recovery grants authenticated access to documents, the knowledge graph, and administrative operations. This issue is fixed in version 1.5.5.","cvssScore":9.1,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-307"],"vendors":[],"products":[],"references":[{"url":"https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/pull/3424","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx","tags":[]}],"exploitRefs":[{"url":"https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/pull/3424","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","tags":[]},{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx","tags":[]}],"hasPoc":true,"ai":{"summary":"The LightRAG login endpoint lacks rate limiting, allowing attackers to perform brute-force password guessing attacks, which can lead to unauthorized access to sensitive documents and administrative operations.","exploitability":"Exploitation is relatively easy given full request speed access, requiring only network connectivity and knowledge of the endpoint.","blast_radius":"If exploited, this can result in unauthorized access to sensitive data and administrative functions, potentially leading to significant data breaches.","remediation":"Upgrade to version 1.5.5 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","brute-force","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-28T08:50:56.208Z"}}