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Security audit

Mem

Security checks for vulnerabilities and agentic risk

Overview

Mem operations have clear approval safeguards, but setup can automatically execute unverified downloaded software with effects beyond Mem.

Review and approve the CLI installation separately before allowing automatic setup. Check its changes to other agents' skills and account access. Mem data passes through OOMOL, and permanent deletion remains possible after approval. The downloaded installers and connector service were not verified; no malicious behavior was established.

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
97% confidence
Finding

The declared purpose concerns Mem data management, but the supplied code executes an external installer for an apparently different service. Installation can be a supporting implementation detail, but this chunk establishes no relationship between the Oomol installer and Mem. The downloaded script's contents and any further actions are not available for assessment.

Content

No source excerpt is available for this finding.

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The curl-to-bash command immediately executes mutable remote content without pinning or artifact-integrity verification. HTTPS protects transport but does not protect against a compromised publisher or distribution endpoint, which could supply code that accesses local files and credentials; the legitimate dependency-installation purpose does not eliminate this supply-chain risk.

Content

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

First-time setup instructs execution of remote installation scripts without a system-integrity warning.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The fallback setup instructs immediate execution of downloaded shell or PowerShell scripts without requiring informed approval or verification of their contents. If the installer or its distribution infrastructure is compromised, this can execute attacker-controlled code with the invoking user's permissions; restricting installation to a missing-CLI error reduces exposure but does not establish trust.

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