CVE-2026-10858 PUBLISHED

IBM MQ for HPE NonStop is vulnerable to a denial of service attack

Assigner: ibm
Reserved: 04.06.2026 Published: 18.09.2026 Updated: 19.09.2026

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer underflow when processing multi-segment messages.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 9.9

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	IBM
Product	MQ for HPE NonStop
Versions	affected from 8.1.0 to 8.1.0.40 (incl.)

Solutions

IBM MQ V8.1 for HPE NonStop 8.1.0.40IT49924 Upgrade to CSU 8.1.0.41 https://www.ibm.com/support/fixcentral/swg/selectFixes

IBM strongly recommends addressing this vulnerability now by installing CSU 8.1.0.41.

References

https://www.ibm.com/support/pages/node/7287704

Problem Types

CWE-122 Heap-based Buffer Overflow CWE