CVE-2026-61740: Hkuds Lightrag

Critical severity, CVSS 9.3. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Hkuds Lightrag: before 1.5.4 (fixed in 1.5.4)

Published 2026-07-15. Last modified 2026-07-15.