MCP rug pull
Server changes tool descriptions after user approval
categoryAI/ML and emerging attacksseverityHighlabnot yet measured
Example: Invariant Labs (2025)
Classification
17 values: 5 imported, 2 derived, 10 machine-classified. What do these mean?
Exploitability
| Attack vector | AI model manipulation |
|---|---|
| Reach (CVSS) | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Attacker skill required | Medium |
| Resources required | Low |
| Likelihood / prevalence | Low |
| Maturity | Emerging |
Impact & scope
| Severity | High |
|---|---|
| Impact | ConfidentialityIntegrity |
| Platform | AI System |
| Environment | AI system |
| Target asset class | ML model / agent |
| Kill-chain phase (tactic) | Defense Evasion (legacy) (deprecated) |
Detection & response
No linked mitigations or detections yet.
Framework references
- Primary source: https://invariantlabs.ai/blog/mcp-security-notification-tool-poisoning-attacks
- atlas: AML.T0109 (primary)
Evidence & sources
- ev-0001 (Cyber Attack Taxonomy) — Name, definition and Example/ID taken verbatim from the 'AI/ML and emerging attacks' table, line 642 of Cyber-Attack-Taxonomy.md
- ev-0002 (Seeded-record enrichment run 2026-09-30 (crosswalk + facet classification)) — Crosswalk to atlas:AML.T0109 as the nearest framework entries; ids verified to exist in the cached catalogues.