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Security audit

Zenkit

Security checks for vulnerabilities and agentic risk

Overview

Zenkit operations have clear approval safeguards, but missing software triggers immediate execution of an unverified remote installer.

Review and approve CLI installation separately, preferably using a pinned, verified release. Check its bundled agent-skill installation and synchronization behavior, connect only the intended Zenkit account, and retain the existing write/delete approvals. The remote installers and hosted connector implementation were not inspected.

Vulnerability Patterns
  • 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
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (4)

Description-Behavior Mismatch

High
Category
MCP Tool Poisoning
Confidence
96% confidence
Finding

The supplied command executes an Oomol-hosted installer rather than performing any visible Zenkit operation. Although installing a dependency could be a supporting implementation detail, this chunk establishes no relationship between that installer and the declared Zenkit functionality. The downloaded script's contents and further effects cannot be determined from the supplied code.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping an HTTPS response directly into bash executes whatever the endpoint supplies without a review or integrity-verification step. HTTPS protects transport but does not protect against a compromised publisher or distribution endpoint, and this is the same underlying installation risk identified in SQP-2 rather than an independent exploit.

Content

Scanner excerpt · SKILL.md (reported line 62)May include surrounding context.

Fallback setup executes remotely downloaded installer scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
96% confidence
Finding

The fallback directs execution of remotely downloaded shell or PowerShell code without prior inspection, integrity verification, or explicit user approval for installing software. Restricting this to a missing-CLI error reduces exposure, but a compromised installer source could still execute arbitrary code with the invoking user's permissions; the issue is unsafe execution, not merely a missing warning.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 83)May include surrounding context.

md
- **`OOMOL_INSUFFICIENT_CREDIT`** — OOMOL billing stop. Recharge at `https://console.oomol.com/billing/token-recharge` before retrying.

- **HTTP 402 without `OOMOL_INSUFFICIENT_CREDIT`** — the third-party account itself has no active plan or credit. Report the provider error message as is; do not ask the user to recharge OOMOL.

## Resources