CVE-2026-12538

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-12538", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-06-17T15:22:07.491Z", "datePublished": "2026-11-04T20:25:41.490Z", "dateUpdated": "2026-11-09T20:52:50.449Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-11-04T20:25:41.490Z"}, "title": "IBM MQ Appliance is affected by an improper validation vulnerability", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-124", "description": "CWE-124 Buffer Underwrite ('Buffer Underflow')", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "MQ Appliance", "versions": [{"status": "affected", "version": "9.4.0.0", "lessThanOrEqual": "9.4.0.26", "versionType": "semver"}, {"status": "affected", "version": "9.4.1.0", "lessThanOrEqual": "9.4.5.3", "versionType": "semver"}, {"status": "affected", "version": "10.0.0.1", "lessThanOrEqual": "10.0.0.5", "versionType": "semver"}], "cpes": ["cpe:2.3:a:ibm:mq_appliance:9.4:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.1.0:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7293035", "tags": ["vendor-advisory", "patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "LOW", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L"}}], "solutions": [{"lang": "en", "value": "This vulnerability is addressed under APAR DT500605.\n\n\n\nIBM strongly recommends addressing the vulnerability now.\n\n\n\nIBM MQ Appliance version 9.4 LTS\nApply IBM MQ Appliance fix pack 9.4.0.30 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.\n\n\n\nIBM MQ Appliance version 9.4 CD - M2003\nUpgrade to IBM MQ Appliance 10.0.0.6 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.\n\n\n\nIBM MQ Appliance version 9.4 CD - M2002\nApply IBM MQ Appliance cumulative security update 9.4.5.4 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.\n\n\n\nIBM MQ Appliance version 10 LTS\nApply IBM MQ Appliance cumulative security update 10.0.0.6 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>This vulnerability is addressed under APAR DT500605.</p><p>IBM strongly recommends addressing the vulnerability now.</p><p><strong>IBM MQ Appliance version 9.4 LTS</strong><br/>Apply <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=9.4.0.30-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance fix pack 9.4.0.30</a>, or later firmware.</p><p><strong>IBM MQ Appliance version 9.4 CD - M2003</strong><br/>Upgrade to <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=10.0.0.6-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance 10.0.0.6</a>, or later firmware.</p><p><strong>IBM MQ Appliance version 9.4 CD - M2002</strong><br/>Apply <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=9.4.5.4-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance cumulative security update 9.4.5.4</a>, or later firmware.</p><p><strong>IBM MQ Appliance version 10 LTS</strong><br/>Apply <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=10.0.0.6-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance cumulative security update 10.0.0.6</a>, or later firmware.</p>"}]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-09T20:52:37.371093Z", "id": "CVE-2026-12538", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-09T20:52:50.449Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-12538", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-09T20:52:37.371093Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-09T20:52:46.416Z"}}], "cna": {"title": "IBM MQ Appliance is affected by an improper validation vulnerability", "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"cpes": ["cpe:2.3:a:ibm:mq_appliance:9.4:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.1.0:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "MQ Appliance", "versions": [{"status": "affected", "version": "9.4.0.0", "versionType": "semver", "lessThanOrEqual": "9.4.0.26"}, {"status": "affected", "version": "9.4.1.0", "versionType": "semver", "lessThanOrEqual": "9.4.5.3"}, {"status": "affected", "version": "10.0.0.1", "versionType": "semver", "lessThanOrEqual": "10.0.0.5"}]}], "solutions": [{"lang": "en", "value": "This vulnerability is addressed under APAR DT500605.\n\n\n\nIBM strongly recommends addressing the vulnerability now.\n\n\n\nIBM MQ Appliance version 9.4 LTS\nApply IBM MQ Appliance fix pack 9.4.0.30 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.\n\n\n\nIBM MQ Appliance version 9.4 CD - M2003\nUpgrade to IBM MQ Appliance 10.0.0.6 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.\n\n\n\nIBM MQ Appliance version 9.4 CD - M2002\nApply IBM MQ Appliance cumulative security update 9.4.5.4 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.\n\n\n\nIBM MQ Appliance version 10 LTS\nApply IBM MQ Appliance cumulative security update 10.0.0.6 https://www.ibm.com/support/fixcentral/swg/selectFixes , or later firmware.", "supportingMedia": [{"type": "text/html", "value": "<p>This vulnerability is addressed under APAR DT500605.</p><p>IBM strongly recommends addressing the vulnerability now.</p><p><strong>IBM MQ Appliance version 9.4 LTS</strong><br/>Apply <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=9.4.0.30-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance fix pack 9.4.0.30</a>, or later firmware.</p><p><strong>IBM MQ Appliance version 9.4 CD - M2003</strong><br/>Upgrade to <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=10.0.0.6-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance 10.0.0.6</a>, or later firmware.</p><p><strong>IBM MQ Appliance version 9.4 CD - M2002</strong><br/>Apply <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=9.4.5.4-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance cumulative security update 9.4.5.4</a>, or later firmware.</p><p><strong>IBM MQ Appliance version 10 LTS</strong><br/>Apply <a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm~WebSphere&amp;product=ibm/WebSphere/IBM+MQ+Appliance+M2000&amp;function=fixId&amp;fixids=10.0.0.6-IBM-MQ-Appliance+&amp;includeSupersedes=1\" rel=\"nofollow\">IBM MQ Appliance cumulative security update 10.0.0.6</a>, or later firmware.</p>", "base64": false}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7293035", "tags": ["vendor-advisory", "patch"]}], "descriptions": [{"lang": "en", "value": "IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.", "supportingMedia": [{"type": "text/html", "value": "<p>IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-124", "description": "CWE-124 Buffer Underwrite ('Buffer Underflow')"}]}], "providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-11-04T20:25:41.490Z"}}}, "cveMetadata": {"cveId": "CVE-2026-12538", "state": "PUBLISHED", "dateUpdated": "2026-11-09T20:52:50.449Z", "dateReserved": "2026-06-17T15:22:07.491Z", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "datePublished": "2026-11-04T20:25:41.490Z", "assignerShortName": "ibm"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:ibm:mq_appliance:9.4:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:mq_appliance:9.4.1.0:*:*:*:*:*:*:*"], "product": "MQ Appliance", "vendor": "IBM", "versions": [{"lessThanOrEqual": "9.4.0.26", "status": "affected", "version": "9.4.0.0", "versionType": "semver"}, {"lessThanOrEqual": "9.4.5.3", "status": "affected", "version": "9.4.1.0", "versionType": "semver"}, {"lessThanOrEqual": "10.0.0.5", "status": "affected", "version": "10.0.0.1", "versionType": "semver"}]}], "source": "psirt@us.ibm.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM MQ 9.4.0.0 to 9.4.0.26, 9.4.1.0 to 9.4.5.3, and 10.0.0.1 to 10.0.0.5 could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to improper validation of message header structure length fields."}], "id": "CVE-2026-12538", "lastModified": "2026-11-09T22:18:47.557", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "psirt@us.ibm.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-12538", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-09T20:52:37.371093Z", "version": "2.0.3"}}]}, "published": "2026-11-04T21:18:11.440", "references": [{"source": "psirt@us.ibm.com", "url": "https://www.ibm.com/support/pages/node/7293035"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-124"}], "source": "psirt@us.ibm.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4.0.0,9.4.0.26]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[9.4.1.0,9.4.5.3]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[10.0.0.1,10.0.0.5]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "MQ Appliance", "source": "cna", "vendor": "IBM"}, "product": "mq_appliance", "vendor": "ibm"}], "created": "2026-11-04T21:45:14.734661+00:00", "updated": "2026-11-04T22:00:18.076676+00:00", "vendors": ["ibm", "ibm$PRODUCT$mq_appliance"]}