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CVE-2026-55165 Lemur : JWT verifier trusts attacker-supplied alg from token header — defense-in-depth gap; chain-dependent ATO with secret disclosure

🗓️ 18 Aug 2026 18:49:59Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 2 Views

Lemur JWT verifier in lemur/auth/service.py trusts attacker-controlled alg header, enabling algorithm confusion attacks.

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20 Aug 2026 03:54Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.14.8
2