CVE-2026-53766
MEDIUMCVSS v3.1: 6.1 · EPSS: 0.0013 (3.0 percentile)
Source data as of:
At a glance
- Severity
- MEDIUM
- CVSS
- 6.1 v3.1 · NVD
- EPSS
- 0.0013 (3.0 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Path Traversal · NVD CWE
- Attack conditions (CVSS vector)
- No user interaction · Source: NVD Vector
- Published
- 2026-06-24 · Modified: 2026-06-26
- References
- Jump to references (1)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
Chrome DevTools for agents (chrome-devtools-mcp) lets your coding agent control and inspect a live Chrome browser. From 0.24.0 until 1.1.0, McpContext.validatePath() enforces workspace roots by checking whether path.resolve(filePath) textually falls under one of the configured root paths. path.resolve() does not canonicalize symbolic links. As a result, a symlink inside a configured workspace root can point to a file outside that root, pass validation, and then be followed by downstream file read/write operations. This bypass applies even when the MCP client correctly declares the roots capability with a non-empty list. It is separate from the documented legacy behavior where missing roots capability allows all paths. The practical impact is a workspace-boundary bypass. In the write direction, filePath-writing tools can overwrite out-of-root files through an in-root symlink. In the read direction, upload_file can read through the symlink and send the file to the currently selected web page. This vulnerability is fixed in 1.1.0.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.