Google indexed Claude share pages, exposing wallet seed phrases and other sensitive data

A Reddit user said on July 25 that a Google search for "site:claude.ai/share" surfaced hundreds of Claude shared conversations that could be read in full. The exposed material reportedly included crypto wallet seed phrases, suspected Social Security numbers and legal discussions. The issue was tied to Anthropic not placing a noindex meta tag on Claude share pages. Although the company’s robots.txt blocked crawling of Claude share URLs, Google could still index those pages when shared links appeared on public websites. The same indexing issue also affected public Claude artifacts, including apps, dashboards and financial tools created by users inside Claude. Search results had shown items such as payroll sheets with employee names, internal CRM chat exports and unpublished product roadmaps. Before July 26, Anthropic updated its configuration and added noindex tags, after which Google began removing Claude-related results. Bing was still showing some shared links, and one GitHub repository had archived 453 Claude conversations and 519 Grok conversations, containing a combined 11,241 plaintext messages.