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CVE-2026-10027

IBM MQ queue manager is vulnerable to unauthenticated remote code execution

High8.1EPSS 0.79%
Published
Updated
Reserved
Assigned by
ibm

Description

IBM MQ could allow a remote attacker to cause a denial of service or execute arbitrary code due to a buffer overflow when processing malformed compressed data on channels configured with compression enabled.

Timeline

  1. ID reserved

    By ibm

  2. · 4 months later

    Published

  3. · 3 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-10027, by who scored it
Scored byCVSSScoreVector
ibmCNA (assigner)3.1High8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.79% · top 43% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Weakness

Affected products

  • IBM · MQ

    • affected 9.1.0.0 – ≤ 9.1.0.37 LTS
    • affected 9.2.0.0 – ≤ 9.2.0.43 LTS
    • affected 9.3.0.0 – ≤ 9.3.0.41 LTS
    • affected 9.3.0.0 – ≤ 9.3.5.1 CD
    • affected 9.4.0.0 – ≤ 9.4.0.25 LTS
    • affected 9.4.0.0 – ≤ 9.4.5.1 CD
    • affected 10.0.0.0

What to do

Solution: This issue was addressed under Known Issue DT472389 IBM MQ version 9.1 LTS Apply cumulative security update 9.1.0.38 https://www.ibm.com/support/pages/downloading-ibm-mq-91-lts IBM MQ version 9.2 LTS Apply cumulative security update 9.2.0.44 https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts IBM MQ version 9.3 LTS Apply cumulative security update 9.3.0.42 https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts IBM MQ version 9.4 LTS Apply cumulative security update https://www.ibm.com/support/pages/downloading-ibm-mq-94-lts  9.4.0.26 https://www.ibm.com/support/pages/downloading-ibm-mq-94-lts IBM MQ version 9.3 CD, 9.4 CD and 10.0.0.0 Upgrade to IBM MQ version 10.0.0.5 https://www.ibm.com/support/pages/downloading-ibm-mq-100

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .