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[ CVE-2026-85734 · Published 22 Sep 2026 ]

lightrag-hku: No Rate Limiting on /login Endpoint Allows Brute-Force Attacks

CVSS 9.1 EPSS <1%Fix available

[ Why it matters ]Priority signals

  • Critical severity: CVSS 9.1

[ Description ]Official 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.

[ Fixes ]Fixes and patches

  • lightrag-hku 1.5.5Fixed version · GitHub Advisories · pip package lightrag-hku: upgrade to 1.5.5 or later (affected < 1.5.5)

[ Packages ]Affected open-source packages

[ References ]References