{"id":"CVE-2026-11918","aliases":["EUVD-2026-78898","GHSA-x4xw-xv9j-3c3q"],"status":"published","title":"IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload structures","description":"IBM ContextForge MCP Gateway \u003c= 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.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00171,"percentile":0.06622,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-184"],"published":"2026-09-15T17:28:57Z","modified":"2026-11-11T02:49:08Z","products":[{"vendor":"ibm","product":"contextforge"},{"vendor":"ibm","product":"contextforge mcp gateway"}],"references":[{"url":"https://www.ibm.com/support/pages/node/7285720","tags":["vendor-advisory","patch","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11918"},{"url":"https://github.com/advisories/GHSA-x4xw-xv9j-3c3q"}],"sources":{"cve":[{"id":"CVE-2026-11918","title":"IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload structures","description":"IBM ContextForge MCP Gateway \u003c= 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.","status":"published","published":"2026-09-15T17:28:57.954Z","modified":"2026-09-20T00:45:43.821Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-184"],"updated_at":"2026-11-02T14:20:04.809935Z"}],"euvd":[{"id":"EUVD-2026-78898","description":"IBM ContextForge MCP Gateway \u003c= 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.","status":"published","published":"2026-09-15T17:28:57Z","modified":"2026-09-20T00:45:43Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T17:28:06.225065Z"}],"ghsa":[{"id":"GHSA-x4xw-xv9j-3c3q","title":"IBM ContextForge MCP Gateway \u003c= v1.0.4 IBM mcp-context-forge could allow an authenticated user to...","description":"IBM ContextForge MCP Gateway \u003c= 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.","status":"published","published":"2026-09-15T18:32:34Z","modified":"2026-09-15T18:32:34Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-184"],"updated_at":"2026-11-02T15:11:54.818367Z"}],"nvd":[{"id":"CVE-2026-11918","description":"IBM ContextForge MCP Gateway \u003c= 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.","status":"published","published":"2026-09-15T18:17:12.677Z","modified":"2026-11-09T19:29:49.19Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-184"],"updated_at":"2026-11-09T22:15:51.974844Z"}],"osv":[{"id":"CVE-2026-11918","description":"IBM ContextForge MCP Gateway \u003c= 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.","status":"published","published":"2026-09-15T18:17:12.677Z","modified":"2026-11-11T02:49:08.856967891Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-11T03:21:13.402158Z"}]}}