# Anthropic locks out Claude users after infostealers hijack login sessions

> Source: <https://www.helpnetsecurity.com/2026/08/31/claude-accounts-compromised-through-infostealer/>
> Published: 2026-08-31 11:30:47+00:00

Anthropic has started locking users out of their Claude accounts due to their login sessions having been compromised through infostealer malware. “The malware identified in this campaign so far include Vidar, Lumma (LummaC2), StealC, RedLine and Acreed on Windows, and Atomic Stealer (AMOS) on a small number of Macs,” the company said in emails sent out to affected users last week. “It’s general-purpose malware that typically arrives with an unofficial download or a malicious app, … [More ](https://www.helpnetsecurity.com/2026/08/31/claude-accounts-compromised-through-infostealer/)

The post [Anthropic locks out Claude users after infostealers hijack login sessions](https://www.helpnetsecurity.com/2026/08/31/claude-accounts-compromised-through-infostealer/) appeared first on [Help Net Security](https://www.helpnetsecurity.com).