{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.2.0"
              },
              {
                "fixed": "0.3.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "c2fc4e9717eaf71a0041ec4f882a00e20aa3871d"
            },
            {
              "fixed": "acd16196158f9a393187551b21a2fc61650f2e3d"
            },
            {
              "fixed": "528cb285890fb2d95ba3ee5c9321f3cfa2f6f7cf"
            }
          ],
          "repo": "https://github.com/ibm/mcp-context-forge",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-x6gc-rm5j-55mw"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53711.json"
  },
  "details": "MCP Context Forge provides an MCP Admin UI for managing gateway resources. From 0.2.0 until 0.3.1, the Global Prompts feature stores a prompt template without sufficient output encoding before the MCP Admin UI renders it. An authenticated attacker can save markup containing script-capable event handlers, and the code executes when another user views the saved prompt. The stored cross-site scripting can alter the interface, present phishing content, observe keystrokes available to the page, and act with the viewer's browser session. This issue is fixed in version 0.3.1.",
  "id": "CVE-2026-53711",
  "modified": "2026-10-15T02:30:32.247920898Z",
  "published": "2026-10-13T14:34:01.069Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/IBM/mcp-context-forge/releases/tag/v0.3.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53711.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53711"
    },
    {
      "type": "FIX",
      "url": "https://github.com/IBM/mcp-context-forge/commit/acd16196158f9a393187551b21a2fc61650f2e3d"
    },
    {
      "type": "FIX",
      "url": "https://github.com/IBM/mcp-context-forge/pull/337"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MCP ContextForge: Global Prompts stored cross-site scripting compromises the Admin UI"
}