CVE-2026-11729 IBM MQ Java messaging is vulnerable to remote code execution
An authenticated attacker can execute arbitrary code in client applications via unsafe deserialization leading to JNDI injection in IBM MQ.
- 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-2026-11729?
CVE-2026-11729 is a high-severity unsafe deserialization vulnerability in IBM MQ, published on 15 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 an authenticated attacker to execute arbitrary code in client applications due to unsafe deserialization that enables JNDI injection attacks.
Weakness: CWE-502
Which versions are affected by CVE-2026-11729?
How do I fix CVE-2026-11729?
No fix has been published for CVE-2026-11729 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-2026-11729 being exploited?
There is no known exploitation of CVE-2026-11729 in the wild and no public exploit code.
Sources
Also known as GHSA-fgh4-pvm7-m8pf.