CRITICAL 9.3 NVD

CVE-2026-85394

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 prefix

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. Attackers holding the service's public key can forge HS256 tokens that pass verification when algorithms are not explicitly restricted. This is an incomplete fix for CVE-2024-33663.

References

Published: 2026-09-03 · Source: NVD · Feed updated: 2026-09-03
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-09-03 via NVD.

Risk Timeline

CVE Disclosed2026-09-03 · -1 days ago

Remediation Resources

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