{"id":"CVE-2026-100868","revision":"f09ee29718034640b4eb492489f9c25f","records":[{"revision":"f09ee29718034640b4eb492489f9c25f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100868","aliases":[],"title":"Penpot before 2.18.0 Unauthenticated WebSocket Access via MCP Bridge","description":"Penpot before 2.18.0 binds the MCP server plugin WebSocket bridge to all network interfaces without authentication in single-user mode. Unauthenticated attackers on adjacent networks can connect to the WebSocket port to impersonate the Penpot browser plugin, intercept task payloads, and return forged results to the MCP client.","state":0,"publishedAt":"2026-09-27T13:09:53.387+00:00","modifiedAt":"2026-10-08T15:22:06.862+00:00","affected":[{"ecosystem":"Vendor product","name":"penpot","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"penpot\",\n                    \"product\": \"penpot\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.18.0\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/%40penpot/mcp\"\n                }"},{"ecosystem":"https://www.npmjs.com","name":"@penpot/mcp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"penpot\",\n                    \"product\": \"@penpot/mcp\",\n                    \"collectionURL\": \"https://www.npmjs.com\",\n                    \"packageName\": \"@penpot/mcp\",\n                    \"packageURL\": \"pkg:npm/%40penpot/mcp\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.15.4\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/penpot/penpot/security/advisories/GHSA-ch2q-6x56-qg5r","https://github.com/penpot/penpot/commit/b5274a44766d095247037be18c1d1918ac67ddeb","https://github.com/penpot/penpot/blob/1d2c37e52c733f74017d90b0fd1ae2d074a5c33d/mcp/packages/server/src/PluginBridge.ts#L52","https://github.com/penpot/penpot/security/advisories/GHSA-22qr-rp27-j9wm","https://github.com/penpot/penpot","https://www.vulncheck.com/advisories/penpot-before-2.18.0-unauthenticated-websocket-access-via-mcp-bridge"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100868","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100868","identifiers":["CVE-2026-100868"]},"retained":false,"historicalAffected":[]}],"coverage":[]}