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PYSEC-2026-2528 joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363)

🗓️ 13 Jul 2026 15:46:27Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 1 Views

joserfc.jwt.decode accepts empty or None HMAC keys for HS256/384/512, enabling forged tokens.

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