Report claims Anthropic Slack breach gave attackers full admin access to research secrets
willdepue · x · 2026-10-28
An unverified report claims Anthropic is downplaying a recent security incident: the group 'cathedral' allegedly gained full administrator access to its Slack workspace — able to read every message and impersonate any user — where research secrets are kept.
The author notes both Anthropic and OpenAI keep nearly everything in Slack, comparing it to OpenAI's 2023 hack via an access token from an external app service, and criticizes the irony of national-security-critical labs storing crown jewels in a Salesforce messenger.
Related event: Unverified Claim: Anthropic Slack Fully Compromised with Admin Access(2 posts)→
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