CVE-2026-10027 IBM MQ queue manager is vulnerable to unauthenticated remote code execution

High 8.1 Published 18 Sep 2026 Updated 21 Sep 2026

Remote attackers can execute arbitrary code or cause denial of service via buffer overflow in IBM MQ when compression is enabled.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-10027?

CVE-2026-10027 is a high-severity memory corruption vulnerability in Ibm Mq, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IBM MQ could allow a remote attacker to cause a denial of service or execute arbitrary code due to a buffer overflow when processing malformed compressed data on channels configured with compression enabled.

Weakness: CWE-787

Which versions are affected by CVE-2026-10027?

It affects 1 product.

Products include Ibm Mq.

How do I fix CVE-2026-10027?

No fix has been published for CVE-2026-10027 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-10027 being exploited?

There is no known exploitation of CVE-2026-10027 in the wild and no public exploit code.

All Ibm Mq vulnerabilities

Sources

Also known as GHSA-52gg-3863-7xg6.