Answer in brief
CVE-2026-100868 records a Medium severity (CVSS 5.3) vulnerability in Penpot before 2.18.0 Unauthenticated WebSocket Access via MCP Bridge. The current sources do not mark it as known exploited. The current feed maps penpot/penpot (generic), penpot/@penpot/mcp (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps penpot/penpot (generic), penpot/@penpot/mcp (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| penpot/penpotgeneric | >=0 <2.18.0 | 2.18.0 |
| penpot/@penpot/mcpgeneric | >=0 <=2.15.4 | Not reported |
Published upstream
Sep 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 27, 2026
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.
Quoted source text, attributed separately from HOL analysis.