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Vulnerability record · CVE-2026-61808 · published 7 August 2026

CVE-2026-61808: Missing authentication for critical function vulnerability

LightRAG provides simple and fast retrieval-augmented generation. Through version 1.5.4, the LightRAG API server binds to all network interfaces with authentication disabled by default, allowing an unauthenticated network attacker to read indexed document content, upload or delete documents, modify the knowledge graph, cancel pipelines, clear caches, and consume LLM resources. This issue is mitigated in version 1.5.5rc1.

9.8 CVSS 3.1 Critical EPSS 2.5% · top 15.9% CWE-306 · Missing authentication for critical function Deferred
9.8CVSS 3.1 base score
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
9 Sep 2026Last modified by NVD

Description

LightRAG provides simple and fast retrieval-augmented generation. Through version 1.5.4, the LightRAG API server binds to all network interfaces with authentication disabled by default, allowing an unauthenticated network attacker to read indexed document content, upload or delete documents, modify the knowledge graph, cancel pipelines, clear caches, and consume LLM resources. This issue is mitigated in version 1.5.5rc1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/HKUDS/LightRAG/commit/0bd102401b4b28a02664e5b6af476bf7a4470292
https://github.com/HKUDS/LightRAG/security/advisories/GHSA-mmg5-8x8q-v934
https://github.com/HKUDS/LightRAG/security/advisories/GHSA-mmg5-8x8q-v934

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Source: NIST National Vulnerability Database (record CVE-2026-61808), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.