CTI · corroborated · 2026-08-28

Prompt Injection in Claude Code Opus 5 Auto Mode Enables Malicious Code Execution

Full story & timeline

MITRE ATT&CK

• T1059 Command and Scripting Interpreter Execution
• T1204 User Execution Execution

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://gbhackers.com/prompt-injection-claude-code-auto-mode
• https://cyberpress.org/prompt-injection-claude-opus-5