{"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 Remediation/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 </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>"}]}]}}}