Introducing Rubrik Code Guardian: Attack Your Code Before Attackers Do

Today, Rubrik is introducing Rubrik Code Guardian, a new capability built in a partnership with Anthropic. 

Rubrik Code Guardian uses Anthropic's Claude Mythos 5, run through a custom Rubrik security harness, to red-team source code from a secure, air-gapped copy of the repository. It analyzes the codebase for multi-step vulnerability chains, confirms which ones are actually exploitable, ranks them by severity, and routes confirmed critical issues into tracked remediation work in Jira or GitHub.

It tells security and engineering teams which attack paths are real and which ones to fix first.

Why Traditional Scanners Miss Attack Paths

Traditional code scanners are good at finding individual weaknesses: a weak authorization check here, an input validation gap there, a risky configuration somewhere else. Each finding gets scored and dropped into a queue.

Attackers don't work that way. They look for paths. A minor vulnerability in one service can become critical when it connects to a weakness in another service, an authentication boundary, or a cloud misconfiguration. Scanners that evaluate findings in isolation miss those chains.

As AI models get better at reasoning across entire codebases rather than inspecting one file at a time, that gap matters more. Finding individual vulnerabilities is becoming easier. Determining which ones are real, which combine into exploitable attack paths, and which deserve engineering time is becoming the harder (and more valuable) problem to solve.

What Rubrik Code Guardian Does

Rubrik Code Guardian combines Claude Mythos 5, a Rubrik-engineered security harness, and the secure copy of source code Rubrik already protects. From that isolated environment, it is designed to:

• Reason like an attacker: Rubrik Code Guardian analyzes files, services, authentication patterns, and cloud boundaries together to identify multi-step paths an adversary could use.

• Validate before it escalates: Rubrik Code Guardian tests attack chains for real exploitability rather than flagged because a single weakness exists in isolation.

• Prioritize by impact: Confirmed findings are ranked by exploitability, blast radius, and business criticality.

• Accelerate remediation: Confirmed critical issues can be pushed into Jira or GitHub issues with file-level remediation guidance.

• Preserve recovery: Rubrik's existing recovery workflows remain in place, so teams can restore a known-good codebase if a security event or bad build still occurs.

   

Tested on Rubrik

Before bringing Rubrik Code Guardian to customers, Rubrik tested it against its own codebase. The result: more findings than traditional code scanning tools produced.

That volume is only useful if teams can act on it. More findings without a way to tell which ones matter just creates a bigger backlog. Rubrik Code Guardian validates and prioritizes steps to answer the questions that follow a spike in findings: which chains are actually exploitable, what's the blast radius, and what should get fixed first?

Runs Against a Secure Air-Gapped Copy, Never Production

Rubrik Code Guardian runs Mythos through Rubrik's security harness against a secure clone of the immutable, air-gapped copy of source code Rubrik already maintains. Analysis never touches the live repository or production systems.

This also changes the role of that protected copy. Organizations have historically kept secure copies of source code for recovery after an incident—a bad build, corruption, or a security event. Rubrik Code Guardian gives that same copy a job to do before an incident: it becomes the environment where AI can safely probe for attack paths without any risk to production.

Part of Rubrik's Agentic Cyber Resilience Platform

Rubrik Code Guardian is one piece of a broader set of capabilities addressing security across the software lifecycle in an agentic world:

• Rubrik Codebase Resilience protects and recovers code. 
• Rubrik Code Guardian red-teams code. 
• Rubrik Agent Identity secures the identities and permissions of agents operating in the environment. 
• Rubrik Agent Rewind lets teams undo unwanted agent actions. 
   

Together, these make up  Rubrik Agentic Cyber Resilience, a security platform built for a world where AI is changing the attacker, the defender, the software being built, and the systems acting on it.

Rubrik Code Guardian is currently accepting select design partners for private preview. Customers interested in participating ccan contact our team to get involved. General availability is targeted for fall 2026.