Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVE-2026-44641
Summary
Microsoft APM normalizes marketplace plugins by copying plugin components referenced in `plugin.json` into `.apm/`. The manifest fields `agents`, `skills`, `commands`, and `hooks` are attacker-controlled, but the implementation does not enforce that those paths remain inside the plugin directory. A malicious plugin can therefore use absolute paths or `../` traversal paths to copy arbitrary readable host files or directories from the installer's machine during `apm install`. This affects versions prior to 0.8.12.
- LOW
- LOCAL
- HIGH
- UNCHANGED
- REQUIRED
- NONE
- HIGH
- NONE
CWE-22 - Path Traversal
Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.
References
Advisory Timeline
- Published
