AI data firm Mercor breached via the poisoned LiteLLM package; expert data exposed
Mercor, which supplies human experts to AI labs, says it was hit in late March 2026 by the compromised LiteLLM releases built to steal credentials from systems that installed them. Its investigation, done with Mandiant and others, found sensitive data on a very limited subset of its nearly five million experts was affected, customer impact was very limited and no employee data was involved. It began notifying affected experts on June 25, 2026.
Sources
- Primary: https://www.mercor.com/blog/update-on-mercor-security-incident/
- Upstream: Editorial
- Entered by the cybermap.lol editors, with sources on the entry
Defenses for this class of incident
all categoriesA data breach sits in these classes of the AI-security landscape. The companies below work on that class of problem. This is a taxonomy, not a claim that any of them would have changed this incident.
Vendor data: AI Security Startups Map by Prompt Security (CC BY 4.0), synced daily. startups.prompt.security. Paid placements are labelled Sponsored; HeimWall, which runs this site, is labelled Operator. 453 companies in the directory.
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