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Security audit

Browse AI

Security checks for vulnerabilities and agentic risk

Overview

Setup needs review because it directs remote code execution and can introduce ongoing changes to other agent skills without clearly explaining or obtaining approval for those effects.

Review and approve CLI installation separately, including any changes to other agents' skills. The installer contents could not be inspected. The linked [command reference](https://github.com/oomol-lab/oo-cli/blob/main/docs/commands.md) documents OO_SKILLS_SYNC_DISABLED to suppress startup skill synchronization. Browse AI access through OOMOL is disclosed, and the skill requires approval before writes or cookie replacement.

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
98% confidence
Finding

The code accesses an Oomol installation endpoint and executes its response, which is materially different from the declared Browse AI purpose. Nothing supplied establishes this installer as a supporting dependency for Browse AI. The remote script's contents are unavailable, so its further behavior cannot be determined.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

Piping a remotely fetched script directly into Bash executes its contents with the invoking user's privileges without a separate review or integrity-verification step. HTTPS protects transport but does not prevent a compromised distribution endpoint from supplying malicious code; the PowerShell setup example has the same risk. The legitimate dependency relationship and conditional execution reduce exposure but do not eliminate this supply-chain vulnerability.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

The setup workflow executes downloaded installation scripts without warning the user about local system changes.

Medium
Category
Output Handling
Confidence
92% confidence
Finding

The fallback instructs the agent to install software when the CLI is missing without requiring explicit approval or explaining the installer's local effects. A request to operate Browse AI does not necessarily authorize installing executable software or changing the local environment, although the conditional setup limits exposure.

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 81)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