Trellix: unauthorized access to part of its source code repository

What happened

• Trellix said it “recently identified unauthorized access to a portion of our source code repository,” found no evidence that release or distribution was affected or that the code had been exploited, and notified law enforcement.
• Root cause: not disclosed.
• RansomHouse later claimed the attack and leaked images as proof (BleepingComputer).
• Investigation with outside forensics.

Sources

• https://bleepingcomputer.com/news/security/trellix-discloses-data-breach-after-source-code-repository-hack
• https://thehackernews.com/2026/05/trellix-confirms-source-code-breach.html

This is a brief: a short, sourced summary from our incident tracking. Full advisories add commands to check whether you are affected.