T08 · Insecure Dependencies
- Location
SKILL.md:407- Finding
Unpinned Third-Party Dependency Installation
- Content
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Vulnerability Details
File Location:
SKILL.md:407
Vulnerability Type: Unpinned third-party package installation
Risk Level: LowComplete Code Snippet:
markdown | PyYAML | Python library | Optional | `pip install pyyaml` (required for custom rules) |Technical Analysis
The skill instructs users or agents to install PyYAML without specifying an exact version or verifying an integrity hash. Consequently, installation results can change over time and may introduce a release that was never assessed with this skill.
The package name shown is the legitimate PyYAML package rather than an evident typosquat, and no malicious dependency behavior was observed. The risk arises from mutable dependency resolution and the absence of package-integrity controls.
Attack Path
- A user enables the documented custom-rules feature.
- The user or agent runs
pip install pyyamlas instructed. pipresolves whichever compatible package release the configured package index currently serves.- If that release or the package-distribution channel has been compromised, unreviewed code may enter the environment.
- Malicious package code could run during installation or when the organizer imports the dependency.
Exploitation therefore requires compromise of the upstream package, release process, configured package index, or package-delivery path; the repository itself contains no demonstrated malicious package.
Impact Assessment
Malicious dependency code would generally execute with the privileges of the account running
pipor importing the package. It could access files, environment variables, credentials, and network resources available to that account. If installation is performed with administrative privileges, the potential scope may extend system-wide.The issue is rated Low because PyYAML is optional, exploitation depends on an external supply-chain compromise, and the audited project doe ...[truncated 53 chars]
- Remediation
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Remediation Suggestions
- Pin PyYAML to an explicitly reviewed version:
text PyYAML==<reviewed-version> - Store dependencies in a requirements or lock file with SHA-256 hashes and install them using:
bash python3 -m pip install --require-hashes -r requirements.txt - Document and enforce a trusted package index instead of relying on an arbitrary environment configuration.
- Reassess and update the pinned version through a controlled dependency-review process.
- Install into an isolated virtual environment with minimum privileges and never recommend administrative installation.
- Include the claimed
organizer.pyimplementation in the package so its dependency usage and file-handling behavior can be audited.
- Pin PyYAML to an explicitly reviewed version: