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Authlib JWS JWK Header Injection: Signature Verification Bypass

🗓️ 29 Jun 2026 11:50:45Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 3 Views

Authlib JWS accepts attacker supplied JWK header when key is None, enabling forged tokens bypassing verification.

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01 Jul 2026 20:22Current
7.2High risk
Vulners AI Score7.2
CVSS 3.19.1
EPSS0.00548
SSVC
3