# Anthropic CVE Rediscovery (CVE Rediscovery)

> Anthropic's internal evaluation of whether a model can independently rediscover known vulnerabilities from 1,829 CVE advisories, given only the affected source code.

Canonical page: https://benchlm.ai/benchmarks/cverediscovery

- Category: [Agentic](/agentic)
- Last updated: November 10, 2026

## About CVE Rediscovery

- Year: 2026
- Tasks: 1,829 CVE advisories
- Format: Share of advisories rediscovered
- Difficulty: Vulnerability discovery
- Paper: [Claude Fable 5.2 and Claude Mythos 5.2 system card](https://assets.claude.com/27d60918d218125e7504bc7354c4b4626ec56b11.pdf)

Run in October 2026 at max effort with cyber and biology safeguards off. Models may submit several reports; counting only the first five lowers Mythos 5.2's score by 4.4 points. Internal and dual-use, so BenchLM keeps it display-only.

CVE Rediscovery is currently displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Leaderboard (3 models)

| Rank | Model | Creator | Score |
|------|-------|---------|-------|
| 1 | [Claude Mythos 5.2](/models/claude-mythos-5-2) | Anthropic | 89.6% |
| 2 | [Claude Opus 5.5](/models/claude-opus-5-5) | Anthropic | 81.3% |
| 3 | [Claude Mythos 5.1](/models/claude-mythos-5-1) | Anthropic | 78.3% |

## FAQ

### What does CVE Rediscovery measure?

Anthropic's internal evaluation of whether a model can independently rediscover known vulnerabilities from 1,829 CVE advisories, given only the affected source code.

### Which model scores highest on CVE Rediscovery?

Claude Mythos 5.2 by Anthropic currently leads with a score of 89.6% on CVE Rediscovery.

### How many models are evaluated on CVE Rediscovery?

3 AI models have published results on CVE Rediscovery in the BenchLM catalog.

### Does CVE Rediscovery affect BenchLM's overall score?

Not directly. CVE Rediscovery is still displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Compare Top Models on CVE Rediscovery

- [Claude Mythos 5.2 vs Claude Opus 5.5](/compare/claude-mythos-5-2-vs-claude-opus-5-5)
- [Claude Opus 5.5 vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-claude-opus-5-5)