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

🗓️ 01 Oct 2026 16:38:40Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 1 Views

PyJWT asymmetric-PEM detection bypass allows universal forgery by using a public key as HS256.

Related
Detection
Refs
Vulners
Node
pypipyjwtRange0–2.14.0

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01 Oct 2026 17:10Current
6Medium risk
Vulners AI Score6
CVSS 3.17.5 - 9.1
CVSS 25
EPSS0.01355
SSVC
1