CVE-2026-120459
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.
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The sources do not list affected products or versions for this vulnerability yet.
0.3%16th percentile
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Published
First publication at the source
Last modified
Latest change at the source
Collected
First seen by Baba Yaga Security