Quick answers
- Is CVE-2026-11828 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11828 being exploited in the wild.
- How severe is CVE-2026-11828?
- Medium severity, with a CVSS score of 5.9, published 19 October 2026.
- Which products and versions are affected?
- IBM MQ.
- Is there a fix for CVE-2026-11828?
- No fixed version is recorded yet. Use encrypted channels (TLS/SSL) for all IBM MQ communications to prevent man-in-the-middle exploitation. Restrict queue manager administrative access to trusted administrators only. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-11828 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-11828?
- Check whether you run IBM Mq. 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.
How to fix
Use encrypted channels (TLS/SSL) for all IBM MQ communications to prevent man-in-the-middle exploitation. Restrict queue manager administrative access to trusted administrators only.
Technical details
The vulnerability stems from improper validation of queue name length values in IBM MQ's asynchronous message consumption code path. An attacker with queue manager control or man-in-the-middle (MITM) access on unencrypted channels can exploit this by injecting malformed queue name data that triggers a crash in affected client applications. The attack requires either privileged queue manager access or network-level interception capability on unencrypted communication channels.
Affected products
- IBM MQ
Timeline
- 2026-10-19: disclosed