Security audit

pypdf

Security checks for vulnerabilities and agentic risk

Overview

This PDF utility skill performs clear local PDF operations, with only a dependency-installation caution to consider.

Install pypdf in an isolated environment and prefer a pinned, trusted package source. Only run the PDF commands on files and output locations you intend the agent to access or modify.

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: SKILL.md:45
Finding: Unpinned Third-Party Dependency Installation
Content: View full analysis
Remediation: View remediation
``` 2. Generate and verify cryptographic hashes for all permitted distribution artifacts. Install with hash enforcement, such as: ```bash python3 -m pip install --require-hashes -r requirements.txt ``` 3. Use an explicitly trusted package index or an internally controlled package mirror rather than relying on ambient pip configuration. 4. Review and update the pinned dependency through a controlled process that includes vulnerability scanning, release-note review, and compatibility testing. 5. Install dependencies in an isolated virtual environment using a non-privileged account. Do not recommend system-wide or administrator-level installation. 6. Update `SKILL.md` and the runtime error message in `scripts/pypdf_cli.py` so they reference the verified requirements file rather than the unconstrained `pip install pypdf` 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

Static analysis

No suspicious patterns detected.