{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18535", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-07-31T20:31:32.104Z", "datePublished": "2026-11-07T04:56:45.212Z", "dateUpdated": "2026-11-07T04:56:45.212Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-11-07T04:56:45.212Z"}, "title": "IBM API Connect Denial of Service", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1333", "description": "CWE-1333 Inefficient regular expression complexity", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "API Connect", "versions": [{"status": "affected", "version": "12.1.0.0", "lessThanOrEqual": "12.1.1.2", "versionType": "semver"}, {"status": "affected", "version": "10.0.8.0", "lessThanOrEqual": "10.0.8.12", "versionType": "semver"}], "defaultStatus": "unaffected", "cpes": ["cpe:2.3:a:ibm:api_connect:12.1.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:api_connect:12.1.1.2:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:api_connect:10.0.8.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:api_connect:10.0.8.12:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack and to improper neutralisation of wildcard query operators.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack and to improper neutralisation of wildcard query operators.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7291753", "tags": ["vendor-advisory", "patch"]}, {"url": "https://www.ibm.com/support/pages/node/7292434", "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": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 9.6, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H"}}], "solutions": [{"lang": "en", "value": "IBM strongly recommends addressing the vulnerability now by upgrading to v12.1.1.3\nFix Central Link: https://www.ibm.com/support/pages/node/7290205 \n\n\n\nIBM strongly recommends addressing the vulnerability now by upgrading to 10.0.8.13\n\n\n\nFix Central Link: https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm%7EWebSphere&product=ibm/WebSphere/IBM+API+Connect&release=10.0.8.12&platform=All&function=all", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM strongly recommends addressing the vulnerability now by upgrading to v12.1.1.3<br>Fix Central Link: <a href=\"https://www.ibm.com/support/pages/node/7290205\" rel=\"nofollow\">https://www.ibm.com/support/pages/node/7290205</a></p><p>IBM strongly recommends addressing the vulnerability now by upgrading to 10.0.8.13</p><p>Fix Central Link:<a href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm%7EWebSphere&amp;product=ibm/WebSphere/IBM+API+Connect&amp;release=10.0.8.12&amp;platform=All&amp;function=all\" rel=\"nofollow\">https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=ibm%7EWebSphere&amp;product=ibm/WebSphere/IBM+API+Connect&amp;release=10.0.8.12&amp;platform=All&amp;function=all</a></p>"}]}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:ibm:api_connect:12.1.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:api_connect:12.1.1.2:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:api_connect:10.0.8.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:api_connect:10.0.8.12:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "product": "API Connect", "vendor": "IBM", "versions": [{"lessThanOrEqual": "12.1.1.2", "status": "affected", "version": "12.1.0.0", "versionType": "semver"}, {"lessThanOrEqual": "10.0.8.12", "status": "affected", "version": "10.0.8.0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are vulnerable to a Regular Expression Denial of Service (ReDoS) attack and to improper neutralisation of wildcard query operators."}], "id": "CVE-2026-18535", "lastModified": "2026-11-07T05:18:59.300", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.6, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 5.8, "source": "[email protected]", "type": "Primary"}]}, "published": "2026-11-07T05:18:59.120", "references": [{"source": "[email protected]", "url": "https://www.ibm.com/support/pages/node/7291753"}, {"source": "[email protected]", "url": "https://www.ibm.com/support/pages/node/7292434"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1333"}], "source": "[email protected]", "type": "Primary"}]}

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