Is CVE-2026-12356 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-12356?

CVE-2026-12356 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-12356

Description

IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0 through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through 10.0.0.5 LTS and CD could allow an authenticated user with command queue access to execute arbitrary code by injecting malicious arguments into Ant script commands.