What happened
Rubrik announced (Sept 15, 2026) Rubrik Code Guardian, a custom software harness built on Anthropic's Claude Mythos 5 that red-teams customers' source code against an air-gapped copy of their repository, validating exploit chains and prioritizing remediation, developed in partnership with Anthropic.
Why it matters
A major publicly-traded data-security vendor is operationalizing frontier-model red-teaming directly into enterprise vulnerability management, signaling that 'AI vs AI' code security (using frontier models to find and prioritize exploitable vulnerabilities at machine speed) is moving from research to shipped enterprise product.
Applicability
Enterprises using Rubrik for data/cyber resilience evaluating automated, frontier-model-driven code vulnerability discovery; security leaders benchmarking AI-augmented AppSec tooling now.