Is CVE-2026-84964 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-84964?

CVE-2026-84964 has a CVSS v3 severity of MEDIUM (5.9).

Back

CVE-2026-84964

Description

A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.