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  4. CVE 2026 10858 ibm mq for hpe nonstop is vulnerable to a denial
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Back to active CVEs
Critical · CVSS 9.9CVE-2026-10858

IBM MQ for HPE NonStop is vulnerable to a denial of service attackCVE-2026-10858

Answer in brief

CVE-2026-10858 records a Critical severity (CVSS 9.9) vulnerability in IBM MQ for HPE NonStop is vulnerable to a denial of service attack. The current sources do not mark it as known exploited. The current feed maps IBM/MQ for HPE NonStop (generic), IBM/MQ for HPE NonStop (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 18, 2026Updated Sep 19, 2026Source checked Nov 2, 2026First seen by HOL Sep 18, 2026Material review Sep 19, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.9
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/MQ for HPE NonStop (generic), IBM/MQ for HPE NonStop (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/MQ for HPE NonStopgeneric>=8.1.0 <=8.1.0.40Not reported
IBM/MQ for HPE NonStopgeneric8.1.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/MQ for HPE NonStop, IBM/MQ for HPE NonStop.
  2. 2Review the reported fix. Source-reported solution: 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.

Evidence timeline and material changes

  1. Published upstream

    Sep 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 18, 2026

Sources and claim methodology

  • Source referenceibm.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-122
Source
CVE List V5
Source checked
Nov 2, 2026
References
1 linked source
Open source record