Anthropic Claude shared conversations indexed by Google, exposing sensitive information such as crypto wallet seed phrases

According to Odaily, on July 25, a Reddit user discovered hundreds of fully accessible Claude shared conversations through a Google search using "site:claude.ai/share". These conversations included sensitive information such as crypto wallet seed phrases, suspected social security numbers, legal discussions, and more.

The issue was caused by Anthropic not adding a noindex meta tag to Claude's shared pages. Although its robots.txt file blocked crawling of Claude share URLs, Google could still index those pages when the share links appeared on public websites.

The same problem also affected Claude public artifacts, including apps, dashboards, and financial tools created by users within Claude. Relevant search results previously showed salary sheets containing employee names, internal customer relationship management chat exports, and unreleased product roadmaps.

Before July 26, Anthropic updated its configuration and added the noindex tag, after which Google began removing Claude-related results. Bing still displays some shared links; a GitHub repository has archived 453 Claude conversations and 519 Grok conversations, totaling 11,241 plaintext messages.