CVE-2026-39413 — LightRAG has a JWT Algorithm Confusion Vulnerability in LightRAG API
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…
Published: 2026-04-08 · CVSS: 4.2 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7