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2 vulnerabilities found for by mpdavis

CVE-2026-120459 (GCVE-0-2026-120459)
Vulnerability from cvelistv5
Published
2026-11-02 14:29
Modified
2026-11-02 14:29
Severity ?
9.1 (Critical) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Summary
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. When an application's HS256/HS384/HS512 verification key resolves to empty, such as an oct JWK with empty k, attackers can forge tokens with arbitrary claims that jwt.decode accepts.
References
Impacted products
Vendor Product Version
mpdavis python-jose Version: 0   ≤ 3.5.0
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Show details on NVD website

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CVE-2026-85394 (GCVE-0-2026-85394)
Vulnerability from cvelistv5
Published
2026-09-03 18:54
Modified
2026-09-14 13:50
Severity ?
9.3 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Summary
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
Impacted products
Vendor Product Version
mpdavis python-jose Version: 0   ≤ 3.5.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

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