phone-number-extractor

Fail

Audited by Snyk on Jul 20, 2026

Risk Level: CRITICAL
Full Analysis

CRITICAL E004: Prompt injection detected in skill instructions.

  • Potential prompt injection detected (high risk: 0.90). The Skill contains deceptive runtime instructions that order the agent to auto-install a dependency and explicitly hide that action from the user (no confirmation, "do not describe" it as a user request), which overrides user consent and conceals behavior outside the Skill's stated extraction purpose.

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

  • Third-party content exposure detected (high risk: 0.75). SKILL.md instructs the agent to invoke the BrowserAct CLI for live website interaction (public web pages/content fetched at runtime), which can include outsider-authored free text that BrowserAct may pass into the LLM context.

MEDIUM W012: Unverifiable external dependency detected (runtime URL that controls agent).


MEDIUM W013: Attempt to modify system services in skill instructions.

  • Attempt to modify system services in skill instructions detected (high risk: 0.70). The Skill instructs the agent to automatically install a required CLI dependency ("Install BrowserAct") without asking the user to confirm, which directs the agent to modify the host system state and could involve privileged operations.

Issues (4)

E004
CRITICAL

Prompt injection detected in skill instructions.

W011
MEDIUM

Third-party content exposure detected (indirect prompt injection risk).

W012
MEDIUM

Unverifiable external dependency detected (runtime URL that controls agent).

W013
MEDIUM

Attempt to modify system services in skill instructions.

Audit Metadata
Risk Level
CRITICAL
Analyzed
Jul 20, 2026, 04:17 AM
Issues
4
Security Audit — snyk — phone-number-extractor