SB2026060240 - Use of Hard-coded Cryptographic Key in cjose

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Hard-coded Cryptographic Key (CVE-ID: N/A)

CWE-ID: CWE-321 - Use of Hard-coded Cryptographic Key

CVSSv4: 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/E:U/U:Amber

The vulnerability allows a remote attacker to disclose plaintext and modify protected content.

The vulnerability exists due to use of a hard-coded cryptographic key in JWE encryption in src/jwe.c when encrypting a JWE with an AES-CBC-HMAC content-encryption algorithm together with a key-management algorithm that generates a fresh CEK. A remote attacker can obtain a produced JWE and decrypt or forge its contents to disclose plaintext and modify protected content.

This affects only JWEs produced by the vulnerable encryption path; the issue does not affect the decryption path.

Remediation

Install update from vendor's website.

References

• https://github.com/OpenIDC/cjose/security/advisories/GHSA-f6wf-pqg3-6wqq
• https://github.com/OpenIDC/cjose/commit/2a6e5bd969fa20059fb00913fb9f57d77ea6a4d9