Is CVE-2026-84185 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-84185?

CVE-2026-84185 has a CVSS v3 severity of MEDIUM (5.9).

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CVE-2026-84185

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.