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PYSEC-2026-4145 PyJWT: Asymmetric-PEM detection bypass: whitespace/line-ending-mutated public keys skip the HS/asymmetric confusion guard

🗓️ 01 Oct 2026 16:38:40Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 10 Views

PyJWT asymmetric-PEM detection bypass enables universal forgery via HMAC secret confusion.

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01 Oct 2026 17:45Current
7.8High risk
Vulners AI Score7.8
CVSS 3.19.1
EPSS0.00202
10