{"id":"CVE-2026-85734","state":"PUBLISHED","title":"LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks","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.","publishedAt":"2026-09-22T16:18:14.144Z","updatedAt":"2026-09-22T17:43:42.025Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["HKUDS LightRAG"],"affected":[{"vendor":"HKUDS","product":"LightRAG","versions":[{"version":"< 1.5.5","status":"affected"}]}],"references":["https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx","https://github.com/HKUDS/LightRAG/pull/3424","https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54","https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5"],"weaknesses":["CWE-307"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/85xxx/CVE-2026-85734.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85734","state":"PUBLISHED","datePublished":"2026-09-22T16:18:14.144Z","dateUpdated":"2026-09-22T17:43:42.025Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-04T14:50:16.719Z"},"containers":{"cna":{"title":"LightRAG: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"HKUDS","product":"LightRAG","versions":[{"version":"< 1.5.5","status":"affected"}]}],"references":[{"url":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx","name":"https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/HKUDS/LightRAG/pull/3424","name":"https://github.com/HKUDS/LightRAG/pull/3424","tags":["x_refsource_MISC"]},{"url":"https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54","name":"https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54","tags":["x_refsource_MISC"]},{"url":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","name":"https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-307","lang":"en","description":"CWE-307: Improper Restriction of Excessive Authentication Attempts","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-22T16:18:14.144Z"},"source":{"advisory":"GHSA-frch-4w6v-q5xx","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T17:36:54.076707Z","id":"CVE-2026-85734","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-22T17:43:42.025Z"}}]}}}