MEDIUM 5.3 NVD
CVE-2026-100868
Penpot before 2.18.0 binds the MCP server plugin WebSocket bridge to all network interfaces without authentication in single-user mode. Unauthenticated attacker
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.
References
- https://github.com/penpot/penpot
- https://github.com/penpot/penpot/blob/1d2c37e52c733f74017d90b0fd1ae2d074a5c33d/mcp/package
- https://github.com/penpot/penpot/commit/b5274a44766d095247037be18c1d1918ac67ddeb
- https://github.com/penpot/penpot/security/advisories/GHSA-22qr-rp27-j9wm
- https://github.com/penpot/penpot/security/advisories/GHSA-ch2q-6x56-qg5r
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-09-27 via NVD.
vulnfeed aggregates 11720 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.