Microsoft apm up to 0.8.11 Plugin plugin.json path traversal

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft apm up to 0.8.11. The affected element is an unknown function of the file plugin.json of the component Plugin Handler. The manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-44641. The attack can only be performed from a local environment. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft apm up to 0.8.11. This issue affects some unknown functionality of the file plugin.json of the component Plugin Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-44641 since 05/07/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

By approaching the search of inurl:plugin.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 0.8.12 eliminates this vulnerability.

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Productinfo

Vendor

• Microsoft

Name

• apm

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5
• 0.8.6
• 0.8.7
• 0.8.8
• 0.8.9
• 0.8.10
• 0.8.11

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://github.com/microsoft/apm/

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