Is CVE-2026-12670 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-12670?

CVE-2026-12670 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-12670

Description

IBM MQ could allow an authenticated attacker to cause a denial of service through a specially crafted message that triggers excessive memory operations during character set conversion.