Quick answers
- Is CVE-2026-11375 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11375 being exploited in the wild.
- How severe is CVE-2026-11375?
- High severity, with a CVSS score of 8.8, published 18 September 2026.
- Which products and versions are affected?
- IBM Mq 9.1.0.0–9.1.0.37 LTS, 9.2.0.0–9.2.0.43 LTS, 9.3.0.0–9.3.0.41 LTS, 9.3.0.0–9.3.5.1 CD, 9.4.0.0–9.4.0.25 LTS, 9.4.0.0–9.4.5.1 CD, 10.0.0.0.
- Is there a fix for CVE-2026-11375?
- A patch was published on 2026-09-14: Patches available: 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26, and 10.0.0.5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-11375 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-11375?
- 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
A stack buffer overflow exists in IBM MQ's queue manager when processing crafted XA (distributed transaction) identifiers. The vulnerability requires authentication and network access, allowing an authenticated attacker to overflow a buffer and potentially achieve remote code execution or denial of service. Patches are available for all affected LTS and CD versions.
Affected products
- IBM MQ 9.1.0.0–9.1.0.37 LTS, 9.2.0.0–9.2.0.43 LTS, 9.3.0.0–9.3.0.41 LTS, 9.3.0.0–9.3.5.1 CD, 9.4.0.0–9.4.0.25 LTS, 9.4.0.0–9.4.5.1 CD, 10.0.0.0
Timeline
- 2026-09-14: disclosed
- 2026-09-14: patched: Patches available: 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26, and 10.0.0.5