# CVE-2026-61736

## Summary

- **CVE ID:** CVE-2026-61736
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N)
- **CWE:** CWE-942
- **Published:** Jul 15, 2026
- **Last Modified:** Jul 15, 2026

## Description

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.

## Affected Products

- HKUDS — LightRAG (< 1.5.4)

## References

- [CNA](https://github.com/HKUDS/LightRAG/security/advisories/GHSA-6x6h-qqr7-855w)
- [CNA](https://github.com/HKUDS/LightRAG/pull/3317)
- [CNA](https://github.com/HKUDS/LightRAG/commit/09567a4c983f580050db63569dd477122c058c3d)
- [CNA](https://github.com/HKUDS/LightRAG/commit/df68d75f9dc29dd340ffb6794b48f48c4fdc9a2d)
- [CNA](https://github.com/HKUDS/LightRAG/commit/ebba6548639c0f2e8919100eff76b401f1222252)
- [CNA](https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.53%
- **EPSS Percentile:** 43.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._