---
title: "CVE-2026-61736: LightRAG: CORS Wildcard + Credentials Enables Any-Origin Credentialed Requests"
url: https://erroneo.us/security/cve/CVE-2026-61736/
description: "CVE-2026-61736 (lightrag-hku (PyPI)): LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, the server defaults to CORSORIGINS=…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-07-15
date_modified: 2026-07-20
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-61736"
kev: false
cvss: 9.3
epss: 0.01422
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-61736: LightRAG: CORS Wildcard + Credentials Enables Any-Origin Credentialed Requests

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.4% , percentile 73: FIRST’s model estimates a 1.4% chance of exploitation activity in the next 30 days, higher than 73% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
- Only applies if your dependency tree includes lightrag-hku (PyPI) <= 1.5.3, fixed in 1.5.4 . Check your lockfile, including transitive dependencies.

## What it is

LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, the server defaults to CORSORIGINS= combined with allowcredentials=True in lightrag/api/lightragserver.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 packages

- PyPI `lightrag-hku` <= 1.5.3 → fixed: 1.5.4

## Affected products (CVE record)

- HKUDS LightRAG: < 1.5.4

## Severity

- GitHub_M CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.3 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.42% probability of exploitation activity in the next 30 days; percentile 73.

## Sources

- [GitHub Advisory GHSA-6x6h-qqr7-855w](https://github.com/advisories/GHSA-6x6h-qqr7-855w)
- [CVE.org record CVE-2026-61736](https://www.cve.org/CVERecord?id=CVE-2026-61736)
- [NVD entry CVE-2026-61736](https://nvd.nist.gov/vuln/detail/CVE-2026-61736)
- [github.com](https://github.com/HKUDS/LightRAG/security/advisories/GHSA-6x6h-qqr7-855w)
- [github.com](https://github.com/HKUDS/LightRAG/pull/3317)
- [github.com](https://github.com/HKUDS/LightRAG/commit/09567a4c983f580050db63569dd477122c058c3d)
- [github.com](https://github.com/HKUDS/LightRAG/commit/df68d75f9dc29dd340ffb6794b48f48c4fdc9a2d)
- [github.com](https://github.com/HKUDS/LightRAG/commit/ebba6548639c0f2e8919100eff76b401f1222252)
- [github.com](https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4)

---
Source page: https://erroneo.us/security/cve/CVE-2026-61736/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt