Anthropic
Disclosed Jan 29, 2024Unverified
Contractor mistakenly emailed file of customer names and credit balances to third party
Anthropic told customers a contractor mistakenly sent a file containing a subset of customer names and open credit balances to an unauthorized third party; the company said it was human error and not a breach of its systems.
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Jan 29, 2024 |
| Attack | Insider |
| Data exposed | NamesFinancial |
| Sector | AI · US |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
Sources
Notices filed
Other breaches at Anthropic
Infostealer-stolen session cookies used to hijack Claude accountsHacking exposed credentials and tokens, payment cards and prompts and chats.HackingAIUSUnverifiedAug 31Shared Claude conversations appeared in Google search resultsExposed data exposed prompts and chats, messages and source code.Exposed dataAIUSUnverifiedJul 27Claude Code source code accidentally published in npm packageExposed data exposed source code.Exposed dataAIUSUnverifiedMar 31DeepSeek, Moonshot and MiniMax used 24,000 fraudulent accounts to distill ClaudeAI or model exposed training data.AI or modelAIUSFeb 23Chinese state group manipulated Claude Code to attack about 30 organizationsHacking exposed internal documents and credentials and tokens.HackingAIUSNov 13, 2025Cybercriminal used Claude Code to steal and extort data from at least 17 organizationsExtortion exposed financial details, health records and credentials and tokens.ExtortionAIUSAug 27, 2025
History of this record
First recordedby seedSource
First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.