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8.6 High

CVE-2023-37464 OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE)

Description

OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE). The AES GCM decryption routine incorrectly uses the Tag length from the actual Authentication Tag provided in the JWE. The spec says that a fixed length of 16 octets must be applied. Therefore this bug allows an attacker to provide a truncated Authentication Tag and to modify the JWE accordingly. Users should upgrade to a version >= 0.6.2.2. Users unable to upgrade should avoid using AES GCM encryption and replace it with another encryption algorithm (e.g. AES CBC).

Affected products and versions

Product Affected versions Fixed in
cjose 0.6 earliest → < 0.6.2.2 0.6.2.2
cjose 0.6 earliest → < 0.6.2.2 0.6.2.2

Other CVEs of cjose

The 3 CVEs of cjose →
CVE-2026-53939 OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE) 9.1 Critical CVE-2026-53938 OpenIDC/cjose is a C library implementing the Javascript Object Signing and Encryption (JOSE) 8.2 High
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