CVE-2026-12669: IBM MQ Out-of-bounds Read

Published Oct 15, 2026
·
Updated

IBM MQ could allow an authenticated attacker to trigger a minor out-of-bounds read when sending malformed compressed data, though the data is not disclosed and the request is rejected.

Affected Software

2 affected components
IBM MQ Operator<=SC2: v3.2.0 - v3.2.29 CD:  v3.3.0, v3.4.0, v3.4.1, v3.5.0, v3.5.1 - v3.5.3, v3.6.0 - v3.6.4, v3.7.0 - v3.7.2, v3.8.0, v3.8.1, v3.9.0, v3.9.1, v3.9.2, v4.0.0, v4.0.1, v4.0.2, v4.0.3, v4.0.4 LTS: v2.0.0 - 2.0.29
IBM supplied MQ Advanced container images<=SC2: 9.4.0.6-r1, 9.4.0.6-r2, 9.4.0.7-r1, 9.4.0.10-r1, 9.4.0.10-r2, 9.4.0.11-r1, 9.4.0.11-r2, 9.4.0.11-r3, 9.4.0.12-r1, 9.4.0.15-r1 - 9.4.0.15-r4, 9.4.0.16-r1, 9.4.0.16-r2, 9.4.0.17-r1, 9.4.0.17-r2, 9.4.0.20-r1, 9.4.0.21-r1, 9.4.0.21-r2, 9.4.0.25-r1 - 9.4.0.25-r3, 9.4.0.26-r1CD: 9.4.1.0-r1, 9.4.1.0-r2, 9.4.1.1-r1, 9.4.2.0-r1, 9.4.2.0-r2, 9.4.2.1-r1, 9.4.2.1-r2, 9.4.3.0-r1, 9.4.3.0-r2, 9.4.3.1-r1 - 9.4.3.1-r3, 9.4.4.0-r1 - 9.4.4.0-r4, 9.4.4.1-r1, 9.4.5.0-r1, 9.4.5.0-r2, 9.4.5.1-r1, 10.0.0.0-r1 - 10.0.0.0-r4, 10.0.0.5-r1LTS: 9.3.0.0-r1, 9.3.0.0-r2, 9.3.0.0-r3, 9.3.0.1-r1, 9.3.0.1-r2, 9.3.0.1-r3, 9.3.0.1-r4, 9.3.0.3-r1, 9.3.0.4-r1, 9.3.0.4-r2, 9.3.0.5-r1, 9.3.0.5-r2, 9.3.0.5-r3, 9.3.0.6-r1, 9.3.0.10-r1, 9.3.0.10-r2, 9.3.0.11-r1,9.3.0.11-r2, 9.3.0.15-r1, 9.3.0.16-r1, 9.3.0.16-r2, 9.3.0.17-r1, 9.3.0.17-r2, 9.3.0.17-r3, 9.3.0.20-r1, 9.3.0.20-r2, 9.3.0.21-r1, 9.3.0.21-r2, 9.3.0.21-r3, 9.3.0.25-r1, 9.4.0.0-r1, 9.4.0.0-r2, 9.4.0.0-r3, 9.4.0.5-r1, 9.4.0.5-r2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM MQ Container to a version that resolves this vulnerability.

    Fixed in 10.0.0.5-r2
  2. Upgrade

    Upgrade IBM MQ Container to a version that resolves this vulnerability.

    Fixed in 10.0.1.0-r1
  3. Upgrade

    Upgrade IBM MQ Advanced to a version that resolves this vulnerability.

    Fixed in 9.4.0.26-r2
  4. Upgrade

    Upgrade IBM MQ Operator to a version that resolves this vulnerability.

    Fixed in v3.2.30
  5. Upgrade

    Upgrade IBM MQ Operator to a version that resolves this vulnerability.

    Fixed in v4.0.5
  6. Upgrade

    Upgrade IBM MQ Operator to a version that resolves this vulnerability.

    Fixed in v4.1.0

Event History

Oct 15, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Oct 19, 2026
CVE Published
via MITRE·04:40 PM
Data Sourced
via MITRE·04:40 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

Who can exploit this issue?

An attacker must be authenticated and able to send malformed compressed data to an affected IBM MQ deployment. The available information does not identify any unauthenticated attack path.

2

What is the practical impact of a successful attempt?

The issue causes a minor out-of-bounds read, but the malformed request is rejected and no data is disclosed. No integrity or availability impact is described.

3

How can I tell whether an exploit attempt occurred?

Look for rejected requests involving malformed compressed data in IBM MQ logging or monitoring. The provided information does not specify a unique error message, log event, or indicator of compromise.

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