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CVE-2026-11728 (GCVE-0-2026-11728)

Vulnerability from cvelistv5 – Published: 2026-09-15 17:42 – Updated: 2026-09-16 03:56
VLAI
Title
IBM MQ .NET client is vulnerable to remote code execution
Summary
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker to cause a denial of service or potentially execute arbitrary code in the client due to a heap buffer overflow when receiving messages from a malicious queue manager or through a man-in-the-middle attack.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 00:00 UTC
CWE
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7284943 vendor-advisorypatch
Impacted products
Vendor Product Version CPE status
IBM MQ Affected: 9.1.0.0 , ≤ 9.1.0.37 LTS (semver)
Affected: 9.2.0.0 , ≤ 9.2.0.43 LTS (semver)
Affected: 9.3.0.0 , ≤ 9.3.0.41 LTS (semver)
Affected: 9.3.0.0 , ≤ 9.3.5.1 CD (semver)
Affected: 9.4.0.0 , ≤ 9.4.0.25 LTS (semver)
Affected: 9.4.0.0 , ≤ 9.4.5.1 CD (semver)
Affected: 10.0.0.0
    cpe:2.3:a:ibm:mq:9.1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.1.0.37:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.2.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.2.0.43:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.3.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.3.0.41:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.3.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.4.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.4.0.25:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:9.4.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:mq:10.0.0.0:*:*:*:*:*:*:*
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href=\\\"https://www.ibm.com/support/pages/downloading-ibm-mq-94-lts\\\" rel=\\\"noopener noreferrer nofollow\\\"\u003eApply cumulative security update\u003c/a\u003e\u003ca href=\\\"https://www.ibm.com/support/pages/downloading-ibm-mq-94-lts\\\" rel=\\\"noopener noreferrer nofollow\\\"\u003e\\u00a09.4.0.26\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.3 CD, 9.4 CD and 10.0.0.0\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/pages/downloading-ibm-mq-100\\\" rel=\\\"noopener noreferrer nofollow\\\"\u003eUpgrade to IBM MQ version 10.0.0.5\u003c/a\u003e\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.ibm.com/support/pages/node/7284943\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker to cause a denial of service or potentially execute arbitrary code in the client due to a heap buffer overflow when receiving messages from a malicious queue manager or through a man-in-the-middle attack.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker to cause a denial of service or potentially execute arbitrary code in the client due to a heap buffer overflow when receiving messages from a malicious queue manager or through a man-in-the-middle attack.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"shortName\": \"ibm\", \"dateUpdated\": \"2026-09-15T17:42:20.952Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-11728\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-15T18:33:56.615Z\", \"dateReserved\": \"2026-06-09T02:32:45.930Z\", \"assignerOrgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"datePublished\": \"2026-09-15T17:42:20.952Z\", \"assignerShortName\": \"ibm\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.