Improper Verification of Cryptographic Signature Affecting superset-fips-6.1 package, versions <6.1.0-r7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published3 Oct 2026
- disclosed28 Sept 2026
Introduced: 28 Sep 2026
NewCVE-2026-102268 (opens in a new tab)How to fix?
Upgrade Chainguard superset-fips-6.1 to version 6.1.0-r7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream superset-fips-6.1 package and not the superset-fips-6.1 package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, is_pem_format in jwt/utils.py is affected because is_pem_format does not recognize every PEM representation accepted by the cryptography loader. This occurs when an application mixes HMAC and asymmetric algorithms and supplies a mutated public-key PEM as raw key bytes. As a result, HMACAlgorithm.prepare_key treats the unrecognized asymmetric public key as an HMAC secret. Consequently, an attacker who knows the public key can forge authenticated HMAC tokens. This issue is fixed in version 2.14.0.