# CVE-2026-13293: IBM MQ Java deserialization remote code execution

Source: https://junglewise.ai/threats/cve-2026-13293-ibm-mq-java-deserialization-remote-code-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-13293 · Severity: high · CVSS 8.8 · Published 2026-09-14

IBM MQ is an enterprise message-oriented middleware platform used by organizations to reliably route and process business transactions across systems. A vulnerability in the Java messaging component allows authenticated attackers to bypass security controls and execute arbitrary code on systems using JMS ObjectMessages, potentially compromising data, operations, and system integrity.

Technologies: [IBM Mq](https://junglewise.ai/threats/technologies/mq). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-13293 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-13293 being exploited in the wild.

**How severe is CVE-2026-13293?** High severity, with a CVSS score of 8.8, published 14 September 2026.

**Which products and versions are affected?** 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; 10.0.0.0.

**Is there a fix for CVE-2026-13293?** A patch was published on 2026-09-14: Cumulative security updates released: 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26, 10.0.0.5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-13293 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-13293?** 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 deserialization of untrusted data flaw (CWE-502) in the IBM MQ JMS client that bypasses the Java deserialization allowlist. An authenticated, network-connected attacker can exploit this by sending a specially crafted JMS ObjectMessage to execute arbitrary code on systems consuming those messages. The attack requires prior authentication to MQ and does not require user interaction. IBM has released cumulative security updates for all affected versions (9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26, and 10.0.0.5).

## Affected products

- 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; 10.0.0.0

## Timeline

- 2026-09-14: disclosed
- 2026-09-14: patched: Cumulative security updates released: 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26, 10.0.0.5

## References

- [https://www.ibm.com/support/pages/node/7284896](https://www.ibm.com/support/pages/node/7284896)

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