# CVE-2026-11725: IBM MQ integer overflow in MQINQ request

Source: https://junglewise.ai/threats/cve-2026-11725-ibm-mq-could-allow-an-authenticated-attacker-to-cause-a-denial-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-11725 · Severity: high · CVSS 8.8 · Published 2026-09-18

IBM MQ is a message queueing system used by enterprises to route and deliver messages between applications. An authenticated attacker could exploit an integer overflow in the MQINQ request processor to crash the queue manager (denial of service) or execute arbitrary code with queue manager privileges, potentially compromising the entire messaging infrastructure.

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

## Quick answers

**Is CVE-2026-11725 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11725 being exploited in the wild.

**How severe is CVE-2026-11725?** High severity, with a CVSS score of 8.8, published 18 September 2026.

**Which products and versions are affected?** IBM Mq 10.0.0.0.

**Is there a fix for CVE-2026-11725?** A patch was published on 2026-09-14: Fixes available: MQ 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26 LTS; 10.0.0.5 for CD and latest Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-11725 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-11725?** 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

An integer overflow in IBM MQ's MQINQ request validation allows an authenticated network attacker to trigger memory corruption. The vulnerability requires existing authentication credentials and network access to the queue manager, but no user interaction. Successful exploitation grants arbitrary code execution in the context of the queue manager process.

## Affected products

- IBM MQ 9.1.0.0 to 9.1.0.37 LTS
- IBM MQ 9.2.0.0 to 9.2.0.43 LTS
- IBM MQ 9.3.0.0 to 9.3.0.41 LTS
- IBM MQ 9.3.0.0 to 9.3.5.1 CD
- IBM MQ 9.4.0.0 to 9.4.0.25 LTS
- IBM MQ 9.4.0.0 to 9.4.5.1 CD
- IBM MQ 10.0.0.0

## Timeline

- 2026-09-14: disclosed
- 2026-09-14: patched: Fixes available: MQ 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26 LTS; 10.0.0.5 for CD and latest

## References

- [https://www.ibm.com/support/pages/node/7284944](https://www.ibm.com/support/pages/node/7284944)

## Related threats

- [IBM MQ integer overflow in malformed MQINQ request](https://junglewise.ai/threats/cve-2026-18142-ibm-mq-9-2-0-0-through-9-2-0-44-lts-9-3-0-0-through-9-3-0-42-lts)
- [IBM MQ password disclosure in log files](https://junglewise.ai/threats/cve-2026-14252-ibm-mq-9-2-0-0-through-9-2-0-44-lts-9-3-0-0-through-9-3-0-42-lts)
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