Every public data breach

44 disclosed this week · 26,355 on record

Mercor

Disclosed Mar 31, 2026Unverified

AI training data contractor hit via compromised LiteLLM open source package

Mercor, which supplies expert-generated training data to AI labs, confirmed a security incident tied to TeamPCP's compromise of the LiteLLM project while Lapsus$ claimed to hold its data. WIRED reported Meta paused work with Mercor over fears proprietary training datasets were exposed.

What is known

People affectedNot stated in the sources we have
DisclosedMar 31, 2026
AttackSupply chain
Data exposedTraining dataInternal documents
SectorAI · US
StatusUnverified: not yet confirmed by an official notice, a filing or the organization

Sources

Notices filed

History of this record
Added2026-09-25
First recordedby seedSource

First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.

Everything about Mercor