Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4
- https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4
FAQ
What is CVE-2026-45539?
CVE-2026-45539 is a vulnerability with a CVSS score of 7.4 (HIGH). 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.rglo...
How severe is CVE-2026-45539?
CVE-2026-45539 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45539?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.