Vulnerability · Published Sep 3, 2026 · Assigned by redhat
CVE-2026-84185Jwcrypto: jwcrypto: general json jws kid binding bypass during jwkset verification
Medium 5.9
In plain English
A medium-severity security flaw in Red Hat Ansible Automation Platform 2 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | python-jwcrypto | no fix listed | DEBIAN-CVE-2026-84185 |
| Debian:14 | python-jwcrypto | no fix listed | DEBIAN-CVE-2026-84185 |
| Ubuntu:22.04:LTS | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-84185 |
| Ubuntu:24.04:LTS | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-84185 |
| Ubuntu:26.04:LTS | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-84185 |
| Ubuntu:26.10 | python-jwcrypto | no fix listed | UBUNTU-CVE-2026-84185 |
Affected products (as reported)
Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-84185 vdb-entry, x_refsource_REDHAT
- RHBZ#2526729 issue-tracking, x_refsource_REDHAT