CVE-2026-85734

CVSS 9.1 (critical) · published 2026-09-22

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.

Weakness: CWE-307

Source: NVD CVE-2026-85734

References

• https://github.com/HKUDS/LightRAG/commit/135bc9056e9ecd800c1abe2f2ce24d1a86622a54
• https://github.com/HKUDS/LightRAG/pull/3424
• https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5
• https://github.com/HKUDS/LightRAG/security/advisories/GHSA-frch-4w6v-q5xx

Check your software

Connect an AI agent to the FixLane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.