CVE-2026-10575: IBM MQ heap buffer overflow in MQPUT operations

CVE-2026-10575 · Severity: high · CVSS 8.8 · Published 2026-09-18

IBM MQ is an enterprise messaging system used to transport data between applications and systems. An authenticated attacker can exploit a heap buffer overflow vulnerability when IBM MQ processes specially crafted message distribution headers, leading to service outages or potentially gaining elevated privileges to execute arbitrary code on the messaging infrastructure.

Technologies: IBM Mq. Vendors: IBM.

Quick answers

Is CVE-2026-10575 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-10575 being exploited in the wild.
How severe is CVE-2026-10575?
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-2026-10575?
A patch was published on 2026-09-18: Cumulative security updates available: 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26; upgrade to 10.0.0.5 for CD/10.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-10575 attacked?
It is attacked over the network.
Am I affected by CVE-2026-10575?
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 heap-based buffer overflow (CWE-122) exists in IBM MQ when processing MQPUT operations with malformed distribution headers. The vulnerability requires an authenticated attacker with network access to the queue manager. An attacker can send a crafted MQPUT request to trigger the buffer overflow, resulting in denial of service or potential privilege escalation and remote code execution. Patches are available for all affected LTS and CD versions: apply cumulative security updates for versions 9.1–9.4 LTS, or upgrade to version 10.0.0.5 or later for CD/10.0 streams.

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

  • 2026-09-18: disclosed: Initial publication of security bulletin
  • 2026-09-18: patched: Cumulative security updates available: 9.1.0.38, 9.2.0.44, 9.3.0.42, 9.4.0.26; upgrade to 10.0.0.5 for CD/10.0

References

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