Security audit

Rtk Compressor

Security checks for vulnerabilities and agentic risk

Overview

This skill is a small, coherent RTK Compressor helper, but users should treat its external PyPI install as normal third-party code rather than fully reviewed skill code.

Install only if you are comfortable running the rtk-compressor package from PyPI. Prefer a virtual environment, avoid sudo/admin installation, and pin or verify the package version when using it in sensitive workflows. Be aware that the docs are Chinese-first and contain a command-name inconsistency between rtk-compressor and rtk-compress.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally

Findings (1)

T08 · Insecure Dependencies

Warning

Location: README.md:17
Finding: Unpinned Third-Party Package Installation
Content: View full analysis
Remediation: View remediation
" ``` 2. Publish cryptographic hashes for the approved distribution artifacts and use a hash-locked requirements file: ```text rtk-compressor== \ --hash=sha256: ``` Install it with: ```bash python3 -m pip install --require-hashes -r requirements.txt ``` 3. Include the skill's implementation or a verifiable source reference in the artifact so auditors can review the code users will execute. 4. Document the authoritative source repository, expected PyPI publisher, release-signing process, and procedure for verifying downloaded artifacts. 5. Recommend installation in an isolated virtual environment under a non-privileged account. Explicitly warn users not to run the installation with `sudo` or unnecessary administrative privileges. 6. Keep the installation and executable names consistent. `SKILL.md` references `rtk-compressor`, while `README.md` references `rtk-compress`; verify and document the legitimate executable name to reduce confusion and accidental invocation of an unrelated local command. ]]>

SkillSpector

Vulnerability Patterns

Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep

Findings (2)

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The skill README is written entirely in Chinese, including usage guidance, with no indication that users may choose another language or that the skill is intentionally limited to a Chinese-speaking audience. Under the language/locale policy, presenting the skill in a single forced language without opt-in is a natural-language policy concern.
Content: No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 95% confidence
Finding: The primary descriptive text is presented in Chinese with no indication that users can choose another language or that the skill is intended only for a Chinese-speaking context. This can violate language/locale policy when a skill imposes a specific language without opt-in or documented justification.
Content: No source excerpt is available for this finding.