{"id":"CVE-2026-53711","title":"MCP Context Forge provides an MCP Admin UI for managing gateway resources","summary":"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 authenticate…","severity":"medium","cvss":5.1,"cvssVector":"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","cwe":["CWE-79"],"vendor":"IBM","product":"mcp-context-forge","affected":["mcp-context-forge >= 0.2.0, < 0.3.1"],"published":"2026-10-13","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:04:29.760","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53711","references":[{"url":"https://github.com/IBM/mcp-context-forge/commit/acd16196158f9a393187551b21a2fc61650f2e3d","label":"security-advisories@github.com"},{"url":"https://github.com/IBM/mcp-context-forge/pull/337","label":"security-advisories@github.com"},{"url":"https://github.com/IBM/mcp-context-forge/releases/tag/v0.3.1","label":"security-advisories@github.com"},{"url":"https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw","label":"security-advisories@github.com"},{"url":"https://github.com/IBM/mcp-context-forge/security/advisories/GHSA-x6gc-rm5j-55mw","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00363,"epssPercentile":0.29914,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T15:48:19.690482Z"},"cvssSource":"cna","ingestedAt":"2026-10-13T15:33:40.079Z","slug":"CVE-2026-53711","body":"## Overview\n\nMCP 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":28.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":220951,"id":"CVE-2026-53711","ts":1792026939756,"field":"exploit_available","old":"false","new":"true"},{"seq":220950,"id":"CVE-2026-53711","ts":1792026939756,"field":"cvss","old":null,"new":"5.1"},{"seq":220949,"id":"CVE-2026-53711","ts":1792026939756,"field":"severity","old":"none","new":"medium"}]}