CVE-2026-12351: IBM MQ remote code execution via JNDI injection

CVE-2026-12351 · Severity: critical · CVSS 9.8 · Published 2026-09-15

IBM MQ is a message-oriented middleware platform used for secure enterprise application integration and messaging across distributed systems. A JNDI injection vulnerability in the Jakarta Resource Adapter IVT servlet allows unauthenticated remote attackers to execute arbitrary code on the hosting application server. This could enable complete compromise of systems running affected versions, including data theft, system manipulation, and lateral movement within networks.

Technologies: IBM Mq. Vendors: IBM.

Quick answers

Is CVE-2026-12351 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-12351 being exploited in the wild.
How severe is CVE-2026-12351?
Critical severity, with a CVSS score of 9.8, published 15 September 2026.
Which products and versions are affected?
IBM Mq 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 LTS; 10.0.0.0.
Is there a fix for CVE-2026-12351?
A patch was published on 2026-09-14: Cumulative security updates released: MQ 9.3.0.42 LTS, 9.4.0.26 LTS, 10.0.0.5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-12351 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-12351?
Check whether you run IBM Mq at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a JNDI injection flaw (CWE-74: Improper Neutralization of Special Elements in Output) in IBM MQ's Jakarta Resource Adapter IVT component that processes unsafe JNDI lookups. The vulnerability is triggered when the IVT application is deployed and requires no authentication or user interaction, making it remotely exploitable over the network. An unauthenticated attacker can inject malicious JNDI references to execute arbitrary code with the privileges of the application server. IBM has released cumulative security updates for LTS versions (9.3.0.42, 9.4.0.26) and version 10.0.0.5 to address this issue.

Affected products

  • IBM MQ 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 LTS; 10.0.0.0

Timeline

  • 2026-09-14: disclosed: Initial publication of IBM security bulletin
  • 2026-09-14: patched: Cumulative security updates released: MQ 9.3.0.42 LTS, 9.4.0.26 LTS, 10.0.0.5

References

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