CVE-2026-53766Public exploit

Workspace escape via unresolved symbolic links

Published Jun 24, 2026 · Updated Jun 24, 2026

Path traversal in Google Chrome DevTools MCP 0.24.0 through 1.0.1 allows local users to overwrite out-of-root files via symlinks. McpContext.validatePath() compares path.resolve() output with configured root strings without resolving links, after which file operations follow an accepted link outside the workspace. Exploitation requires an in-root symlink to an out-of-root target; upload_file can also read that target and send it to the selected page.

CVSS severity6.1
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Google Chrome DevTools MCP 0.24.0 through 1.0.1 allows local users to overwrite out-of-root files via symlinks. McpContext.validatePath() compares path.resolve() output with configured root strings without resolving links, after which file operations follow an accepted link outside the workspace. Exploitation requires an in-root symlink to an out-of-root target; upload_file can also read that target and send it to the selected page.

The record

CVE
CVE-2026-53766
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
Go standard library
Product
Chrome DevTools MCP
Classifications
CWE-59, CWE-22, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=>= 0.24.0, < 1.1.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Go standard library · Chrome DevTools MCPversion=>= 0.24.0, < 1.1.0

Published CVSS scores

6.1GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

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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