CVE-2026-61740

LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, when LightRAG is deployed with LIGHTRAG_API_KEY set but AUTH_ACCOUNTS unset, X-API-Key protection can be bypassed because lightrag/api/auth.py falls back to a hardcoded DEFAULT_TOKEN_SECRET, /auth-status and /login can mint guest JWTs, and combined_dependency in lightrag/api/utils_api.py accepts a valid guest token before checking the API key. A remote unauthenticated attacker can call endpoints guarded by combined_auth, including document read, upload, deletion, graph mutation, and query endpoints. This vulnerability is fixed in 1.5.4.

• CWE-287
• CWE-798

• https://github.com/HKUDS/LightRAG/commit/f7819aa3a49a9d8d92eed8251d82d6ebcafa8cba
• https://github.com/HKUDS/LightRAG/pull/3319
• https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4
• https://github.com/HKUDS/LightRAG/security/advisories/GHSA-f4vv-55c2-5789
• https://github.com/HKUDS/LightRAG/security/advisories/GHSA-f4vv-55c2-5789

Published

Jul 15, 2026

Last Modified

Jul 15, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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