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Signals Exploited in the wild (KEV) 0 Patch available 0 No fix listed 2 Has CVE 2

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Weakness (CWE) CWE-347 Improper Verification of Cryptographic Signature 2

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TI-2026-83851 CVE-2026-120459 · GHSA-7jv8-hwmh-86qc

Authentication bypass in python-jose lets attackers forge JWTs

Priority LOW 39

python-jose through 3.5.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to forge JWTs because HMACKey and CryptographyHMACKey accept zero-length HMAC secrets.

CVSS 4.0CRITICAL 9.1· Network · No auth · No interaction · EPSS 0.00251 · Published 2026-11-02 · No fix listed CWE-347

TI-2026-58602 CVE-2026-85394 · GHSA-3qf3-8w2g-rqmx

python-jose through 3.5.0 Algorithm Confusion via DER-encoded Public Key as HMAC Secret

Priority MEDIUM 41

python-jose through 3.5.0 fails to properly validate asymmetric keys in HMAC initialization, accepting DER-encoded public keys that lack PEM armor or SSH prefixes.

CVSS 4.0CRITICAL 9.3· Network · No auth · No interaction · EPSS 0.00222 · Published 2026-09-03 · No fix listed CWE-347

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