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CVE-2026-12667 (GCVE-0-2026-12667)

Vulnerability from cvelistv5 – Published: 2026-09-15 17:07 – Updated: 2026-09-15 19:00
VLAI
Title
IBM MQ .NET client is vulnerable to XML external entity injection
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 an authenticated attacker to read files from a vulnerable .NET client or cause limited denial of service due to improper handling of XML external entities in RFH2 folder parsing.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 19:00 UTC
CWE
  • CWE-611 - Improper Restriction of XML External Entity Reference
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7284936 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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              "value": "\u003cp\u003eThis issue was addressed under Known Issue DT474690\u003c/p\u003e\u003cp\u003eIBM MQ version 9.1 LTS\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/pages/downloading-ibm-mq-91-lts\" rel=\"noopener noreferrer nofollow\"\u003eApply cumulative security update 9.1.0.38\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.2 LTS\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts\" rel=\"noopener noreferrer nofollow\"\u003eApply cumulative security update 9.2.0.44\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.3 LTS\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts\" rel=\"noopener noreferrer nofollow\"\u003eApply cumulative security update 9.3.0.42\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.4 LTS\u003c/p\u003e\u003cp\u003e\u003ca 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"
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\"9.3.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.3.0.41 LTS\"}, {\"status\": \"affected\", \"version\": \"9.3.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.3.5.1 CD\"}, {\"status\": \"affected\", \"version\": \"9.4.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.4.0.25 LTS\"}, {\"status\": \"affected\", \"version\": \"9.4.0.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.4.5.1 CD\"}, {\"status\": \"affected\", \"version\": \"10.0.0.0\"}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"This issue was addressed under Known Issue DT474690\\n\\n\\n\\nIBM MQ version 9.1 LTS\\n\\n\\n\\n Apply cumulative security update 9.1.0.38 https://www.ibm.com/support/pages/downloading-ibm-mq-91-lts \\n\\n\\n\\nIBM MQ version 9.2 LTS\\n\\n\\n\\n Apply cumulative security update 9.2.0.44 https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts \\n\\n\\n\\nIBM MQ version 9.3 LTS\\n\\n\\n\\n Apply cumulative security update 9.3.0.42 https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts \\n\\n\\n\\nIBM MQ version 9.4 LTS\\n\\n\\n\\n Apply cumulative security update https://www.ibm.com/support/pages/downloading-ibm-mq-94-lts  \\u00a09.4.0.26 https://www.ibm.com/support/pages/downloading-ibm-mq-94-lts \\n\\n\\n\\nIBM MQ version 9.3 CD, 9.4 CD and 10.0.0.0\\n\\n\\n\\n Upgrade to IBM MQ version 10.0.0.5 https://www.ibm.com/support/pages/downloading-ibm-mq-100\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThis issue was addressed under Known Issue DT474690\u003c/p\u003e\u003cp\u003eIBM MQ version 9.1 LTS\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/pages/downloading-ibm-mq-91-lts\\\" rel=\\\"noopener noreferrer nofollow\\\"\u003eApply cumulative security update 9.1.0.38\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.2 LTS\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/pages/downloading-ibm-mq-92-lts\\\" rel=\\\"noopener noreferrer nofollow\\\"\u003eApply cumulative security update 9.2.0.44\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.3 LTS\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/pages/downloading-ibm-mq-93-lts\\\" rel=\\\"noopener noreferrer nofollow\\\"\u003eApply cumulative security update 9.3.0.42\u003c/a\u003e\u003c/p\u003e\u003cp\u003eIBM MQ version 9.4 LTS\u003c/p\u003e\u003cp\u003e\u003ca 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/7284936\", \"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 an authenticated attacker to read files from a vulnerable .NET client or cause limited denial of service due to improper handling of XML external entities in RFH2 folder parsing.\", \"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 an authenticated attacker to read files from a vulnerable .NET client or cause limited denial of service due to improper handling of XML external entities in RFH2 folder parsing.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-611\", \"description\": \"CWE-611 Improper Restriction of XML External Entity Reference\"}]}], \"providerMetadata\": {\"orgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"shortName\": \"ibm\", \"dateUpdated\": \"2026-09-15T17:07:31.538Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-12667\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-15T19:00:37.702Z\", \"dateReserved\": \"2026-06-18T20:29:30.669Z\", \"assignerOrgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"datePublished\": \"2026-09-15T17:07:31.538Z\", \"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.