{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18905", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-08-04T20:21:18.671Z", "datePublished": "2026-09-04T15:56:28.239Z", "dateUpdated": "2026-09-04T15:56:28.239Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-09-04T15:56:28.239Z"}, "title": "IBM ContextForge MCP Gateway is affected by server-side request forgery via DNS TOCTOU at tool invocation", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-918", "description": "CWE-918 Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "ContextForge MCP Gateway (`mcp-contextforge-gateway`)", "versions": [{"status": "affected", "version": "<= v1.0.6"}], "cpes": ["cpe:2.3:a:ibm:contextforge-mcp-gateway:*:*:*:*:*:*:*:*"]}], "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM ContextForge MCP Gateway (`mcp-contextforge-gateway`) &lt;= 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.</p>"}]}], "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"}}], "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\u00a0Remediation/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\u00a0</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>\u00a0Note:</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>"}]}]}}}

{}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:ibm:contextforge-mcp-gateway:*:*:*:*:*:*:*:*"], "product": "ContextForge MCP Gateway (`mcp-contextforge-gateway`)", "vendor": "IBM", "versions": [{"status": "affected", "version": "<= v1.0.6"}]}], "source": "psirt@us.ibm.com"}], "cveTags": [], "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."}], "id": "CVE-2026-18905", "lastModified": "2026-09-04T16:17:21.517", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.7, "baseSeverity": "HIGH", "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:N", "version": "3.1"}, "exploitabilityScore": 3.1, "impactScore": 4.0, "source": "psirt@us.ibm.com", "type": "Primary"}]}, "published": "2026-09-04T16:17:21.517", "references": [{"source": "psirt@us.ibm.com", "url": "https://www.ibm.com/support/pages/node/7286053"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "psirt@us.ibm.com", "type": "Primary"}]}

{}

{}