{"cve":"CVE-2026-45539","nvd":{"published":"2026-05-15T17:16:48.887","modified":"2026-10-26T14:10:00.130","status":"Deferred","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","score":7.4},"cwes":["CWE-59","CWE-200"],"references":["https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4","https://github.com/microsoft/apm/security/advisories/GHSA-q5pp-gvjg-h7v4"],"products":[],"source":"nvd","synced_at":"2026-10-26T14:27:29.784594657+00:00"},"epss":{"cve":"CVE-2026-45539","score":0.00654,"percentile":0.51032,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-q5pp-gvjg-h7v4","url":"https://osv.dev/vulnerability/GHSA-q5pp-gvjg-h7v4","summary":"Microsoft APM: Symlinks under `.apm/prompts/` and `.apm/agents/` are dereferenced during `apm install`, copying host-local file contents into the project tree","modified":"2026-07-13T16:43:23.076874637Z","packages":[{"ecosystem":"PyPI","name":"apm","purl":"pkg:pypi/apm","ranges":[">=0.5.4 <0.13.0"],"fixed":["0.13.0"]}]},{"id":"PYSEC-2026-2377","url":"https://osv.dev/vulnerability/PYSEC-2026-2377","summary":"Microsoft APM: Symlinks under `.apm/prompts/` and `.apm/agents/` are dereferenced during `apm install`, copying host-local file contents into the project tree","modified":"2026-07-13T16:31:31.259491712Z","packages":[{"ecosystem":"PyPI","name":"apm","purl":"pkg:pypi/apm","ranges":[">=0.5.4 <0.13.0"],"fixed":["0.13.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}