CVE-2026-84185

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.

Score
CVSS 3.1 5.9 Medium
Status
Awaiting Analysis - secalert@redhat.com
Published
2026-09-03
Last modified
2026-09-04
Weaknesses
CWE-347

Affected products

References

 
 
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