Penpot before 2.18.0 Unauthenticated WebSocket Access via MCP Bridge
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.
CVE-2026-100868
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-100868
penpot
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
@penpot/mcp
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "penpot",
"product": "penpot",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.18.0",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/%40penpot/mcp",
"defaultStatus": "unaffected"
},
{
"vendor": "penpot",
"product": "@penpot/mcp",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "2.15.4"
}
],
"packageURL": "pkg:npm/%40penpot/mcp",
"packageName": "@penpot/mcp",
"collectionURL": "https://www.npmjs.com",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-100868
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #12688 · Revision 1
- Added to Heist Feed
- Publisher date