CVE-2026-12728 IBM MQ Java messaging is vulnerable to remote code execution
An authenticated attacker can execute arbitrary code in IBM MQ 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-2026-12728?
CVE-2026-12728 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 due to a deserialization of untrusted data.
Weakness: CWE-502
Which versions are affected by CVE-2026-12728?
How do I fix CVE-2026-12728?
No fix has been published for CVE-2026-12728 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-2026-12728 being exploited?
There is no known exploitation of CVE-2026-12728 in the wild and no public exploit code.
Sources
Also known as GHSA-87jg-9mcw-62hx.