CVE-2026-39413— LightRAG has a JWT Algorithm Confusion Vulnerability in LightRAG API
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I. Basic Information for CVE-2026-39413
Vulnerability Information
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Vulnerability Title
LightRAG has a JWT Algorithm Confusion Vulnerability in LightRAG API
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
密码学签名的验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
LightRAG 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LightRAG是中国香港大学数据智能实验室（HKU）开源的一款检索增强生成的应用程序。 LightRAG 1.4.14之前版本存在数据伪造问题漏洞，该漏洞源于存在JWT算法混淆攻击，可能导致攻击者通过指定none算法伪造令牌，造成未经授权的访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-39413
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IV. Related Vulnerabilities
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V. Comments for CVE-2026-39413
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