CVE-2026-61736 — LightRAG provides simple and fast retrieval-augmented generation.¶
Key facts
CVE-2026-61736 is a Critical (9.3) vulnerability: LightRAG provides simple and fast retrieval-augmented generation.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-61736 |
| Severity | Critical (9.3) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-61736/ |
Details¶
English | 한국어
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.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-61736 |
| Type | RCE |
| CVSS Score | 9.3 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-61736/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-61736
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
References¶
- https://github.com/HKUDS/LightRAG/commit/09567a4c983f580050db63569dd477122c058c3d
- https://github.com/HKUDS/LightRAG/commit/df68d75f9dc29dd340ffb6794b48f48c4fdc9a2d
- https://github.com/HKUDS/LightRAG/commit/ebba6548639c0f2e8919100eff76b401f1222252
- https://github.com/HKUDS/LightRAG/pull/3317
- https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4
- https://github.com/HKUDS/LightRAG/security/advisories/GHSA-6x6h-qqr7-855w
- https://github.com/HKUDS/LightRAG/security/advisories/GHSA-6x6h-qqr7-855w
Generated by PoC Generator on 2026-07-16T02:09:21.6868682
Frequently asked questions¶
What is CVE-2026-61736?¶
CVE-2026-61736 is a Critical (9.3) vulnerability: LightRAG provides simple and fast retrieval-augmented generation.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-61736?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-61736?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.