Quick answers
- Is CVE-2026-10743 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-10743 being exploited in the wild.
- How severe is CVE-2026-10743?
- High severity, with a CVSS score of 8.8, published 19 October 2026.
- Which products and versions are affected?
- IBM MQ.
- Is there a fix for CVE-2026-10743?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. 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-2026-10743 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-10743?
- 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.
Technical details
The vulnerability exists in IBM MQ's handling of MQOPEN operations where buffer sizes are not properly validated. An authenticated attacker can craft a specially-formed MQOPEN request to overflow a buffer, causing memory corruption or denial of service. The attack requires authentication but can be executed remotely over the network.
Affected products
- IBM MQ
Timeline
- 2026-10-19: disclosed