CVE-2026-39413

MEDIUM EPSS 4.9%
Published Apr 8, 20262mo ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Apr 8, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
4.9% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 1

CWE-347

Affected Products 1

VendorProductVersionRange
hkudslightrag* <1.4.14

References 2

  • github.com https://github.com/HKUDS/LightRAG/security/advisories/GHSA-8ffj-4hx4-9pgf
    ExploitMitigationVendor Advisory
  • github.com https://github.com/github/advisory-database/issues/7373

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.