Vulnerability · Published Sep 18, 2026 · Assigned by ibm

CVE-2026-11726IBM MQ for HPE NonStop is vulnerable to a denial of service issue

High 8.1

In plain English

A high-severity out-of-bounds read in MQ for HPE NonStop from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.5%top 59.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header offset values.

Affected products (as reported)

Vendor	Product	Versions
IBM	MQ for HPE NonStop	8.1.0 – through 8.1.0.40

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References

https://www.ibm.com/support/pages/node/7287707 vendor-advisory, patch