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PYSEC-2026-4298 python-jose algorithm confusion guard bypassed by DER-encoded public keys

🗓️ 15 Oct 2026 10:22:43Reported by GoogleType 
osv-pysec
 osv-pysec
🔗 osv.dev👁 1 Views

Algorithm confusion in python-jose allows forging HS256 tokens using DER-encoded keys.

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15 Oct 2026 14:56Current
6.7Medium risk
Vulners AI Score6.7
CVSS 3.19.1
CVSS 49.3
EPSS0.00307
1