CVE-2026-94407

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-94407", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-09-21T14:03:52.354Z", "datePublished": "2026-11-13T21:43:35.363Z", "dateUpdated": "2026-11-13T21:43:35.363Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-11-13T21:43:35.363Z"}, "title": "IBM ContextForge MCP Gateway is affected by a regular expression denial of service", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1333", "description": "CWE-1333 Inefficient Regular Expression Complexity", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "ContextForge MCP Gateway", "versions": [{"status": "affected", "version": "1.0.0", "lessThanOrEqual": "1.0.11", "versionType": "semver"}], "cpes": ["cpe:2.3:a:ibm:contextforge_mcp_gateway:1.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:contextforge_mcp_gateway:1.0.11:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "IBM ContextForge MCP Gateway 1.0.0 through 1.0.11 is potentially vulnerable to denial of service due to uncontrolled regular expression complexity (CWE-400 / ReDoS). An authenticated user with tool-registration privileges can embed catastrophically backtracking regex patterns in a tool's JSON Schema `pattern` field; when ContextForge validates arguments against that schema, the validation call may consume unbounded CPU, potentially degrading gateway availability.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM ContextForge MCP Gateway 1.0.0 through 1.0.11 is potentially vulnerable to denial of service due to uncontrolled regular expression complexity (CWE-400 / ReDoS). An authenticated user with tool-registration privileges can embed catastrophically backtracking regex patterns in a tool's JSON Schema `pattern` field; when ContextForge validates arguments against that schema, the validation call may consume unbounded CPU, potentially degrading gateway availability.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7296667", "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": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}], "workarounds": [{"lang": "en", "value": "None. IBM strongly recommends upgrading to the fixed version.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<div><div>None. IBM strongly recommends upgrading to the fixed version.</div></div>"}]}], "solutions": [{"lang": "en", "value": "IBM strongly recommends addressing the vulnerability now.\n\nProduct(s)Version(s) number and/or range\u00a0Remediation/Fix/InstructionsIBM ContextForge MCP Gateway\n\n\n\nv1.0.0 - v1.0.11Upgrade to v1.1.0. See [ v1.1.0 release notes https://github.com/IBM/mcp-context-forge/releases/tag/v1.1.0 ]", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p><strong>IBM strongly recommends addressing the vulnerability now.</strong></p><div><table><tbody><tr><td><strong>Product(s)</strong></td><td><strong>Version(s) number and/or range\u00a0</strong></td><td><strong>Remediation/Fix/Instructions</strong></td></tr><tr><td><div><div>IBM ContextForge MCP Gateway</div></div></td><td>v1.0.0 - v1.0.11</td><td><div><div>Upgrade to v1.1.0. See [<a href=\"https://github.com/IBM/mcp-context-forge/releases/tag/v1.1.0\" rel=\"nofollow\">v1.1.0 release notes</a>]</div></div></td></tr></tbody></table></div><p></p><p></p>"}]}]}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:ibm:contextforge_mcp_gateway:1.0.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:contextforge_mcp_gateway:1.0.11:*:*:*:*:*:*:*"], "product": "ContextForge MCP Gateway", "vendor": "IBM", "versions": [{"lessThanOrEqual": "1.0.11", "status": "affected", "version": "1.0.0", "versionType": "semver"}]}], "source": "psirt@us.ibm.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM ContextForge MCP Gateway 1.0.0 through 1.0.11 is potentially vulnerable to denial of service due to uncontrolled regular expression complexity (CWE-400 / ReDoS). An authenticated user with tool-registration privileges can embed catastrophically backtracking regex patterns in a tool's JSON Schema `pattern` field; when ContextForge validates arguments against that schema, the validation call may consume unbounded CPU, potentially degrading gateway availability."}], "id": "CVE-2026-94407", "lastModified": "2026-11-13T22:17:27.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "psirt@us.ibm.com", "type": "Primary"}]}, "published": "2026-11-13T22:17:27.067", "references": [{"source": "psirt@us.ibm.com", "url": "https://www.ibm.com/support/pages/node/7296667"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1333"}], "source": "psirt@us.ibm.com", "type": "Primary"}]}

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