{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-11918",
        "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "state": "PUBLISHED",
        "assignerShortName": "ibm",
        "dateReserved": "2026-06-10T17:00:06.831Z",
        "datePublished": "2026-09-15T17:28:57.954Z",
        "dateUpdated": "2026-09-20T00:45:43.821Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
                "shortName": "ibm",
                "dateUpdated": "2026-09-15T17:28:57.954Z"
            },
            "title": "IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload structures",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-184",
                            "description": "CWE-184 Incomplete List of Disallowed Inputs",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "IBM",
                    "product": "ContextForge MCP Gateway",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "<= v1.0.4"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:ibm:contextforge_mcp_gateway:*:*:*:*:*:*:*:*"
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>IBM ContextForge MCP Gateway &lt;= 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.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.ibm.com/support/pages/node/7285720",
                    "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": "LOW",
                        "integrityImpact": "LOW",
                        "availabilityImpact": "NONE",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 5.4,
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
                    }
                }
            ],
            "workarounds": [
                {
                    "lang": "en",
                    "value": "There is no workaround that fully prevents the bypass while keeping the affected plugins active. Operators may disable `regex_filter` and `deny_filter` in `plugins/config.yaml` to prevent exploitation, at the cost of losing the filtering controls those plugins provide.\n\nIBM strongly recommends upgrading to v1.0.5 or higher, which replaces the top-level-only scan loops with a recursive walker in both plugins.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<div><div>There is no workaround that fully prevents the bypass while keeping the affected plugins active. Operators may disable `regex_filter` and `deny_filter` in `plugins/config.yaml` to prevent exploitation, at the cost of losing the filtering controls those plugins provide.</div><div>IBM strongly recommends upgrading to v1.0.5 or higher, which replaces the top-level-only scan loops with a recursive walker in both plugins.</div></div>"
                        }
                    ]
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "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>",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<div><br/><div>| Product | Affected Version(s) | Fix Version | Instructions |</div><div>|---|---|---|---|</div><div>| | &lt;=1.0.4 | 1.0.5 | Upgrade to v1.0.5 or later. . |</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;=1.0.4</td><td><p>v1.0.5 or later</p><p>See [release notes](<a href=\"https://github.com/IBM/mcp-context-forge/releases/tag/v1.0.5%29\" rel=\"nofollow\">https://github.com/IBM/mcp-context-forge/releases/tag/v1.0.5)</a></p></td></tr></tbody></table></div><p> Note: &lt;Component A / B names&gt; are bundled with &lt;Product profile name&gt; to provide &lt;feature / function description&gt;</p><p></p>"
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-11918",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-09-20T00:34:58.389670Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-20T00:45:43.821Z"
                }
            }
        ]
    }
}