Medium severity4.2NVD Advisory· Published Apr 8, 2026· Updated Apr 22, 2026
CVE-2026-39413
CVE-2026-39413
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
lightrag-hkuPyPI | < 1.4.14 | 1.4.14 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/HKUDS/LightRAG/security/advisories/GHSA-8ffj-4hx4-9pgfnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-8ffj-4hx4-9pgfghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-39413ghsaADVISORY
- github.com/HKUDS/LightRAG/commit/728f2e54509d93e0a44f929c7f83f2c88d6d291bghsaWEB
- github.com/github/advisory-database/issues/7373nvd
News mentions
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