Cursor
AI Agent Reliability Report
Failure Modes
Root Causes
Frequently Asked Questions
Is Cursor reliable?
Based on 2 documented incidents, Cursor has an average failure severity of 3.8/10. 0 incidents were rated critical and 0 were rated high severity. Common failure modes include infinite loop.
What are the most common Cursor failures?
The most frequently documented Cursor failure modes are: infinite loop (1 incidents), scope explosion (1 incidents). These failures range from low to high severity.
How many Cursor AI failures have been documented?
StupidLLM has documented 2 Cursor AI agent failures as of 2026. Each incident is severity-scored on a 0-10 scale, verified against source evidence, and categorized by failure mode and root cause.
All Cursor Incidents
Cursor entered infinite edit loop burning $200 in API costs
While fixing a CSS layout issue, Cursor Agent got stuck in a loop: it would edit a Tailwind class, see the lint warning about the previous class it removed, re-add it, see the orig...
Cursor Agent rewrote entire file instead of making targeted edit
Asked to fix a single typo in a 2000-line configuration file, Cursor Agent decided to 'improve' the entire file. It reformatted all YAML, reordered keys alphabetically, removed com...