CVE-2026-13293 IBM MQ Java messaging is vulnerable to remote code execution
A remote authenticated attacker can execute arbitrary code on IBM MQ systems due to unsafe deserialization of untrusted data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13293?
CVE-2026-13293 is a high-severity unsafe deserialization vulnerability in IBM MQ, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote authenticated attacker to execute arbitrary code on the system due to the deserialization of untrusted data.
Weakness: CWE-502
Which versions are affected by CVE-2026-13293?
How do I fix CVE-2026-13293?
No fix has been published for CVE-2026-13293 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-13293 being exploited?
There is no known exploitation of CVE-2026-13293 in the wild and no public exploit code.
Sources
Also known as GHSA-mqj8-gj7g-c998.