CVE-2026-45539 Details
Description
Microsoft APM is an open-source, community-driven dependency manager for AI agents. From 0.5.4 to 0.12.4, two primitive integrators in apm-cli enumerate package files with bare Path.glob() / Path.rglob() calls and read each match with Path.read_text(), transparently following symbolic links. A symlink committed inside a remote APM dependency under .apm/prompts/<x>.prompt.md or .apm/agents/<x>.agent.md is preserved verbatim into apm_modules/ on clone and then dereferenced during integration, with the resolved content written as a regular file into the project's deploy directories. The package content_hash, the pre-deploy SecurityGate scan, and apm audit do not flag this. The deploy roots are not added to the auto-generated .gitignore, so the resulting files are staged by git add by default. This vulnerability is fixed in 0.13.0.
A vulnerability exists in Microsoft APM versions 0.5.4 through 0.12.4, where the CLI component improperly handles symbolic links in package files. During the integration process, two key functions enumerate files with standard globbing methods that ignore symlinked paths. This oversight allows symlinks pointing to sensitive files to be followed and their contents copied into the project's deployment directories as regular files. Notably, this behavior is not flagged by the package's content hash, a pre-deploy security scan, or the APM audit feature. The issue arises because the deploy directories are not excluded from version control, leading to potential unintentional exposure of sensitive information.
Users can update to Microsoft APM version 0.13.0, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 15, 2026CISA-ADP
Assessed May 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-200 | Exposure of Sensitive Information to an Unauthorized Actor | [email protected] |
| CWE-59 | Improper Link Resolution Before File Access ('Link Following') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Microsoft APM | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 15, 2026 | New CVE Received | [email protected] |
| May 15, 2026 | CVE Modified | CISA-ADP |