Description
joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to version 1.7.3, JWTClaimsRegistry applies membership matching to list-valued iss and sub claims, allowing an array-valued iss that contains the expected issuer to pass an intended equality check and enabling issuer-validation bypass. This issue is fixed in version 1.7.3.
CVSS 6.5EPSS 0.091%Risk 0.66
View source- Published
- 2026-08-24 20:17:19
- Affected versions
- <1.7.3
- Type
- Library
- Last modified
- 2026-08-25 17:18:16
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N