CVE-2026-12355 IBM MQ Resource Adapter IVT servlet is vulnerable to unauthenticated remote code execution
Unauthenticated attackers can execute arbitrary code or disclose information via JNDI injection in the IBM MQ Resource Adapter IVT servlet.
- 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-2026-12355?
CVE-2026-12355 is a high-severity code injection vulnerability in IBM MQ, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, 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 attacker to perform JNDI injection attacks due to insufficient input validation, potentially leading to information disclosure or remote code execution.
Weakness: CWE-74
Which versions are affected by CVE-2026-12355?
How do I fix CVE-2026-12355?
No fix has been published for CVE-2026-12355 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-12355 being exploited?
There is no known exploitation of CVE-2026-12355 in the wild and no public exploit code.
Sources
Also known as GHSA-g8xm-rxm3-h7mp.