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.
- CVSS 4.0
- 9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-287, CWE-798
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-f4vv-55c2-5789 | PyPI | lightrag-hku | <1.5.4 | 1.5.4 |
| PYSEC-2026-3475 | PyPI | lightrag-hku | <1.5.4 | 1.5.4 |
References
- 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