{"api_version":"1","generated_at":"2026-09-20T07:37:25+00:00","cve":"CVE-2026-11918","urls":{"html":"https://cve.report/CVE-2026-11918","api":"https://cve.report/api/cve/CVE-2026-11918.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-11918","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-11918"},"summary":{"title":"IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload structures","description":"IBM ContextForge MCP Gateway <= v1.0.4 IBM mcp-context-forge could allow an authenticated user to bypass protection mechanisms due to incomplete recursive inspection of nested payload content.","state":"PUBLISHED","assigner":"ibm","published_at":"2026-09-15 18:17:12","updated_at":"2026-09-20 01:16:27"},"problem_types":["CWE-184","CWE-184 CWE-184 Incomplete List of Disallowed Inputs"],"metrics":[{"version":"3.1","source":"psirt@us.ibm.com","type":"Secondary","score":"5.4","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"5.4","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"url":"https://www.ibm.com/support/pages/node/7285720","name":"https://www.ibm.com/support/pages/node/7285720","refsource":"psirt@us.ibm.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-11918","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11918","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"IBM","product":"ContextForge MCP Gateway","version":"affected <= v1.0.4","platforms":[]}],"timeline":[],"solutions":[{"source":"CNA","title":"","value":"| Product | Affected Version(s) | Fix Version | Instructions |\n\n|---|---|---|---|\n\n| | <=1.0.4 | 1.0.5 | Upgrade to v1.0.5 or later. . |\n\n\n\n\n\nIBM strongly recommends addressing the vulnerability now.\n\nProduct(s)Version(s) number and/or range Remediation/Fix/InstructionsIBM ContextForge MCP Gateway<=1.0.4\n\nv1.0.5 or later\n\n\n\nSee [release notes]( https://github.com/IBM/mcp-context-forge/releases/tag/v1.0.5) https://github.com/IBM/mcp-context-forge/releases/tag/v1.0.5%29 \n\n\n\n\n\n Note: <Component A / B names> are bundled with <Product profile name> to provide <feature / function description>","time":"","lang":"en"}],"workarounds":[{"source":"CNA","title":"","value":"There is no workaround that fully prevents the bypass while keeping the affected plugins active. 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