Description
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.4.14, the LightRAG API is vulnerable to a JWT algorithm confusion attack where an attacker can forge tokens by specifying 'alg': 'none' in the JWT header. Since the jwt.decode() call does not explicitly deny the 'none' algorithm, a crafted token without a signature will be accepted as valid, leading to unauthorized access. This vulnerability is fixed in 1.4.14.
Published: 2026-04-08
Score: 4.2 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized Access
Action: Apply Patch
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-8ffj-4hx4-9pgf lightrag-hku: JWT Algorithm Confusion Vulnerability
History

Wed, 22 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
References

Mon, 20 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:hkuds:lightrag:*:*:*:*:*:*:*:*

Thu, 09 Apr 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Hkuds
Hkuds lightrag
Vendors & Products Hkuds
Hkuds lightrag

Wed, 08 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Description LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.4.14, the LightRAG API is vulnerable to a JWT algorithm confusion attack where an attacker can forge tokens by specifying 'alg': 'none' in the JWT header. Since the jwt.decode() call does not explicitly deny the 'none' algorithm, a crafted token without a signature will be accepted as valid, leading to unauthorized access. This vulnerability is fixed in 1.4.14.
Title LightRAG has a JWT Algorithm Confusion Vulnerability in LightRAG API
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-22T15:28:31.845Z

Reserved: 2026-04-07T00:23:30.595Z

Link: CVE-2026-39413

cve-icon Vulnrichment

Updated: 2026-04-22T15:28:31.845Z

cve-icon NVD

Status : Modified

Published: 2026-04-08T20:16:25.877

Modified: 2026-04-22T16:16:58.387

Link: CVE-2026-39413

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-09T08:27:35Z

Weaknesses