VULNERABILITY INTELLIGENCE

CVE-2026-39413

CVSS score4.2 MEDIUM
EPSS probability0.17%
CISA KEVNot currently listed
Published2026-04-08
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-347

Primary references