Vulnerability in Hkuds Lightrag

CVE-2026-61736

LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, the server defaults to CORS_ORIGINS=* combined with allow_credentials=True in lightrag/api/lightrag_server.py, causing Starlette CORSMiddleware to effectively whitelist every origin for credentialed cross-origin requests. Any malicious website visited by an authenticated LightRAG user can silently make authenticated API requests, exfiltrating documents and knowledge graph data or performing destructive actions such as deleting the document store. This vulnerability is fixed in 1.5.4.

EPSS: 0.005 (42.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-61736?
CVE-2026-61736 is a critical-severity vulnerability in Hkuds Lightrag, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 9.3/10. Published 2026-07-15.
How severe is CVE-2026-61736?
Critical severity. CVSS v3 base score is 9.3 out of 10.