CVE-2026-45805Public exploit

Unauthenticated code execution via exposed REPL endpoint

Published Jul 15, 2026 · Updated Jul 15, 2026

Remote code execution in Penpot MCP before 2.15.0 allows remote attackers to execute JavaScript through the REPL server. The mcp/packages/server/src/ReplServer.ts Express listener binds to all interfaces, while /execute passes an unauthenticated code field to PluginBridge.executePluginTask(). Reachability requires the non-default MCP module to be running on a shared host or network, granting the MCP process's file, command, and environment access.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Penpot MCP before 2.15.0 allows remote attackers to execute JavaScript through the REPL server. The mcp/packages/server/src/ReplServer.ts Express listener binds to all interfaces, while /execute passes an unauthenticated code field to PluginBridge.executePluginTask(). Reachability requires the non-default MCP module to be running on a shared host or network, granting the MCP process's file, command, and environment access.

The record

CVE
CVE-2026-45805
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Penpot
Product
Penpot
Classifications
CWE-749, T1059.007
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.15.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Penpot · Penpotversion=< 2.15.0

Published CVSS scores

8.8GitHubCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-749Exposed Dangerous Method or Function
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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