Cursor
5
Incidents
6.1
Avg Severity
2
Critical
0
High
Top Failure Modes
Security Vulnerability
1
Destructive Action
1
Infinite Loop
1
Worst Incident
STUPID-2026-0029 10/10Malicious cloned repository triggered code execution in Cursor on Windows
Manus
1
Incidents
7.5
Avg Severity
0
Critical
1
High
Top Failure Modes
Security Vulnerability
1
Worst Incident
STUPID-2026-0063 7.5/10Manus AI leaked its own system prompt when a user simply asked it to read its internal directory
Comparison Summary
| Metric | Cursor | Manus |
|---|---|---|
| Total Incidents | 5 | 1 |
| Avg Severity | 6.1/10 | 7.5/10 |
| Critical Incidents | 2 | 0 |
| Top Failure Mode | Security Vulnerability | Security Vulnerability |
Frequently Asked Questions
Is Cursor or Manus more reliable?
Based on StupidLLM data, Cursor has 5 documented failures (avg severity 6.1/10) while Manus has 1 (avg severity 7.5/10). Cursor shows better reliability based on average severity scores.
What are the main differences between Cursor and Manus failures?
Cursor's most common failure mode is security vulnerability, while Manus most commonly fails via security vulnerability. Cursor has 2 critical incidents vs Manus's 0.