Is CVE-2026-39413 actively exploited?

No active exploitation of CVE-2026-39413 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39413 be exploited remotely?

Yes. CVE-2026-39413 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39413?

CVE-2026-39413 has a CVSS score of 4.2 (MEDIUM).

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MEDIUM

CVE-2026-39413

CWE-347Published: April 8, 2026· Updated: Apr 8, 2026

4.2

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:6.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-39413 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 4.2.