GHSA-q5pp-gvjg-h7v4

Summary

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 was reproduced via the standard owner/repo#tag install flow against a real bare git repository. No --force or special flags were used.

Affected code

Sinks

• src/apm_cli/integration/prompt_integrator.py
PromptIntegrator.find_prompt_files: package_path.glob("*.prompt.md") and apm_prompts.glob("*.prompt.md")
  No symlink filter.

• src/apm_cli/integration/prompt_integrator.py
PromptIntegrator.copy_prompt: source.read_text("utf-8")

• src/apm_cli/integration/agent_integrator.py
AgentIntegrator.find_agent_files: package_path.glob("*.agent.md"), apm_agents.rglob("*.agent.md"), apm_agents.rglob("*.md"), apm_chatmodes.glob("*.chatmode.md")
  No symlink filter.

• src/apm_cli/integration/agent_integrator.py
AgentIntegrator.copy_agent: source.read_text("utf-8")

• src/apm_cli/integration/agent_integrator.py
_write_codex_agent: source.read_text("utf-8"); resolved bytes are embedded into developer_instructions of the generated .codex/agents/<name>.toml

• src/apm_cli/integration/agent_integrator.py
_write_windsurf_agent_skill: same dereference pattern; resolved bytes land in .windsurf/skills/<name>/SKILL.md

Safe pattern already present in the codebase

-...