CVE-2026-84185 Jwcrypto: jwcrypto: general json jws kid binding bypass during jwkset verification
Attackers can bypass authorization checks in applications using jwcrypto by exploiting a key ID binding flaw during JWS verification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-84185?
CVE-2026-84185 is a medium-severity authentication bypass vulnerability in Red Hat Ansible Automation Platform 2, published on 3 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.
Weakness: CWE-347
Which versions are affected by CVE-2026-84185?
How do I fix CVE-2026-84185?
Apply the vendor's patch.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-84185 being exploited?
There is no known exploitation of CVE-2026-84185 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-84185, UBUNTU-CVE-2026-84185.