{"id":"CVE-2026-18905","state":"PUBLISHED","title":"IBM ContextForge MCP Gateway is affected by server-side request forgery via DNS TOCTOU at tool invocation","description":"IBM ContextForge MCP Gateway (`mcp-contextforge-gateway`) <= v1.0.6 MCP Context Forge could allow a remote authenticated attacker to obtain sensitive information due to a DNS rebinding vulnerability during tool invocation.","publishedAt":"2026-09-04T15:56:28.239Z","updatedAt":"2026-09-04T18:24:43.388Z","severity":{"score":7.7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","source":"ibm"},"assigner":"ibm","products":["IBM ContextForge MCP Gateway (`mcp-contextforge-gateway`)"],"affected":[{"vendor":"IBM","product":"ContextForge MCP Gateway (`mcp-contextforge-gateway`)","versions":[{"version":"<= v1.0.6","status":"affected"}],"cpes":["cpe:2.3:a:ibm:contextforge-mcp-gateway:*:*:*:*:*:*:*:*"]}],"references":["https://www.ibm.com/support/pages/node/7286053"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/18xxx/CVE-2026-18905.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-18905","state":"PUBLISHED","datePublished":"2026-09-04T15:56:28.239Z","dateUpdated":"2026-09-04T18:24:43.388Z","assignerShortName":"ibm","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateReserved":"2026-08-04T20:21:18.671Z"},"containers":{"cna":{"title":"IBM ContextForge MCP Gateway is affected by server-side request forgery via DNS TOCTOU at tool invocation","descriptions":[{"lang":"en","value":"IBM ContextForge MCP Gateway (`mcp-contextforge-gateway`) <= v1.0.6 MCP Context Forge could allow a remote authenticated attacker to obtain sensitive information due to a DNS rebinding vulnerability during tool invocation."}],"affected":[{"vendor":"IBM","product":"ContextForge MCP Gateway (`mcp-contextforge-gateway`)","versions":[{"version":"<= v1.0.6","status":"affected"}],"cpes":["cpe:2.3:a:ibm:contextforge-mcp-gateway:*:*:*:*:*:*:*:*"]}],"references":[{"url":"https://www.ibm.com/support/pages/node/7286053","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":"NONE","baseSeverity":"HIGH","baseScore":7.7,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918 Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-09-04T15:56:28.239Z"},"workarounds":[{"lang":"en","value":"Workarounds/Mitigation guidance:\n\nNo complete workaround exists without upgrading. As a partial mitigation, restrict tool-creation\n\npermissions (`tools.create`) to fully trusted users only, limiting the pool of accounts that could\n\nstage a registration with a controlled hostname. This does not eliminate the vulnerability but\n\nreduces exposure in environments where least-privilege access controls are enforced.\n\n\nIBM strongly recommends upgrading to v1.0.7 or higher.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p><strong>Workarounds/Mitigation guidance</strong>:</p><div><div>No complete workaround exists without upgrading. As a partial mitigation, restrict tool-creation</div><div>permissions (`tools.create`) to fully trusted users only, limiting the pool of accounts that could</div><div>stage a registration with a controlled hostname. This does not eliminate the vulnerability but</div><div>reduces exposure in environments where least-privilege access controls are enforced.</div><br/><div>IBM strongly recommends upgrading to v1.0.7 or higher.</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<=v1.0.6 https://github.com/IBM/mcp-context-forge/pull/5925_","supportingMedia":[{"type":"text/html","base64":false,"value":"<div></div><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>IBM ContextForge MCP Gateway</td><td>&lt;=v1.0.6</td><td><a href=\"https://ibm.service-now.com/kb_view.do?sysparm_article=KB0021096\" rel=\"nofollow\">Upgrade to v1.0.7 or higher. </a><a href=\"https://github.com/IBM/mcp-context-forge/releases/tag/v1.0.7%29\" rel=\"nofollow\">https://github.com/IBM/mcp-context-forge/releases/tag/v1.0.7</a></td></tr></tbody></table></div><p> Note:</p><div>_Fix merged: 2026-07-29_</div><div>_Fixing PR: <a href=\"https://github.com/IBM/mcp-context-forge/pull/5925_\" rel=\"nofollow\">https://github.com/IBM/mcp-context-forge/pull/5925_</a></div><p></p>"}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-04T17:39:59.136548Z","id":"CVE-2026-18905","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-04T18:24:43.388Z"}}]}}}