Vulnerability · Published May 15, 2026 · Assigned by GitHub_M
CVE-2026-44641Microsoft APM: plugin.json component paths escape plugin root and copy arbitrary host files during install
High 7.1
In plain English
A high-severity path traversal in apm from microsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Microsoft APM is an open-source, community-driven dependency manager for AI agents. Prior to 0.8.12, 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 vulnerability is fixed in 0.8.12.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | apm-cli | 0.8.12 | GHSA-xhrw-5qxx-jpwr |
| PyPI | apm-cli | 0.8.12 | PYSEC-2026-2379 |
Affected products (as reported)
Weakness: CWE-22, CWE-73 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
References
- https://github.com/microsoft/apm/security/advisories/GHSA-xhrw-5qxx-jpwr x_refsource_CONFIRM