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CVE-2026-100868.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 5.3CVSS 4.0 · disclosure@vulncheck.com
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSDeferredModified Oct 08, 2026

Disclosure summary

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.

Source-reported weakness categories

CWE-1327

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST National Vulnerability Database · NVD-CVE-2026-100868

Open original source · Updated Oct 08, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

Original records & references

PUBLISHED 2026-09-27T09:16:37-04:00
MODIFIED 2026-10-08T12:17:00-04:00
INGESTED 2026-10-10T20:50:44-04:00