Improper Verification of Cryptographic Signature Affecting lightrag-hku package, versions [,1.4.14)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-LIGHTRAGHKU-15928875
- published8 Apr 2026
- disclosed8 Apr 2026
- creditUnknown
Introduced: 8 Apr 2026
CVE-2026-39413 (opens in a new tab)How to fix?
Upgrade lightrag-hku to version 1.4.14 or higher.
Overview
lightrag-hku is a LightRAG: Simple and Fast Retrieval-Augmented Generation
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the validate_token() function. An attacker can gain unauthorized access to protected resources by crafting a JWT with the 'alg' header set to 'none', allowing them to impersonate any user, including administrators.