Critical 9.3Published Jul 15, 2026

CVE-2026-61740LightRAG: Authentication bypass: hardcoded DEFAULT_TOKEN_SECRET and public /auth-status defeat LIGHTRAG_API_KEY protection

Updated under an hour ago (Oct 26, 2026, 4:50 PM ET)

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It affects HKUDS LightRAG. Add what you run to find out whether that includes you.

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Every CVE for HKUDS LightRAG

Exploited in the last 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.

CVSS: 9.3 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-287, CWE-798
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

HKUDS LightRAG hkuds:lightrag (from the name)	before 1.5.4	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.