# Collinear AI releases CWE-bench v2 with 100 public security-fix tasks

> Original title: CWE-bench v2: More coverage, quality, and transparency

- Source: Hugging Face Blog
- Published: 2026-11-03T00:00:00.000Z
- Bad Influence: https://badinfluence.news/items/heldub83xtsxuhp6odpxrwflw
- Original: https://huggingface.co/blog/cwe-bench

## Summary

Collinear AI releases CWE-bench v2, a public set of 100 tasks across 91 CWEs in which agents must find and fix security weaknesses without breaking existing functionality. Among 11 evaluated models, Gemini 4 Argon leads with 67.8% pass@1 and 81.0% pass@4, ahead of Claude Opus 5.5 at 67.3% and 78.0%. The set, grader and harness are open, and the tasks can be run from the Hugging Face Hub with Harbor.