CVE-2026-53765

Chrome DevTools for agents (chrome-devtools-mcp) lets your coding agent control and inspect a live Chrome browser. From 0.20.0 until 1.1.0, The chrome-devtools-mcp daemon writes its PID file with fs.writeFileSync() to a deterministic runtime path. On typical macOS environments, and on Linux sessions where $XDG_RUNTIME_DIR is unset, that runtime path falls back to /tmp/chrome-devtools-mcp-<uid>/daemon.pid. Because the write does not use O_NOFOLLOW, a local low-privilege user on the same POSIX host can pre-create /tmp/chrome-devtools-mcp-<victim_uid>/daemon.pid as a symlink to a file writable by the victim. When the victim later starts daemon mode, fs.writeFileSync() follows the symlink and truncates the target file to the daemon PID string. This vulnerability is fixed in 1.1.0.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/ChromeDevTools/chrome-devtools-mcp/security/advisories/GHSA-3pvj-jv98-qhjq	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:google:chrome-devtools-mcp:*:*:*:*:*:node.js:*:*

History

26 Jun 2026, 18:31

Type	Values Removed	Values Added
CPE		cpe:2.3:a:google:chrome-devtools-mcp::::::node.js::*
First Time		Google Google chrome-devtools-mcp
References	~~() https://github.com/ChromeDevTools/chrome-devtools-mcp/security/advisories/GHSA-3pvj-jv98-qhjq -~~	() https://github.com/ChromeDevTools/chrome-devtools-mcp/security/advisories/GHSA-3pvj-jv98-qhjq - Exploit, Third Party Advisory

24 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-24 22:16

Updated : 2026-06-26 19:16

NVD link : CVE-2026-53765

Mitre link : CVE-2026-53765

CVE.ORG link : CVE-2026-53765

JSON object : View

Products Affected

google

chrome-devtools-mcp

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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