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Your AI agent’s config is now the payload: How attackers are targeting the developer agent harness
July 21, 2026 · Tenable Blog · Severity: MEDIUM
Tenable reveals that attackers now target configuration files for AI coding assistants, such as settings.json and .cursorrules, to inject persistent malware. This new worm class evades AI-based scanners and propagates through organizational repositories by leveraging developer workflows.
Key Takeaways
- AI coding assistant config files become explicit targets for supply-chain attacks.
- Attackers achieve silent persistence by poisoning configuration harnesses.
- A new worm class spreads across repositories via developers' own tools.