Aider
1
Incidents
6.3
Avg Severity
0
Critical
0
High
Top Failure Modes
Wrong File
1
Worst Incident
STUPID-2026-0005 6.3/10Aider modified wrong file — edited production config instead of dev config
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
Comparison Summary
| Metric | Aider | Cursor |
|---|---|---|
| Total Incidents | 1 | 5 |
| Avg Severity | 6.3/10 | 6.1/10 |
| Critical Incidents | 0 | 2 |
| Top Failure Mode | Wrong File | Security Vulnerability |
Frequently Asked Questions
Is Aider or Cursor more reliable?
Based on StupidLLM data, Aider has 1 documented failures (avg severity 6.3/10) while Cursor has 5 (avg severity 6.1/10). Cursor shows better reliability based on average severity scores.
What are the main differences between Aider and Cursor failures?
Aider's most common failure mode is wrong file, while Cursor most commonly fails via security vulnerability. Aider has 0 critical incidents vs Cursor's 2.