Anthropic's Claude AI chat sharing feature has inadvertently made private conversations publicly accessible through Google search, exposing wallet details, access keys, CVs, and company files. The issue stems from a technical oversight: while Anthropic's robots.txt file blocks Google from crawling the share pages, the URLs still get indexed because other websites link to them.
How the leak happened
Google shows 'No information is available for this page' for these links, but the URLs themselves remain in search results. The missing 'noindex' tag isn't the cause — Google can't see the page content anyway. Instead, the indexing occurs because external sites reference the share URLs, giving Google a reason to list them without ever fetching the page.
The share feature creates a public web page containing all messages up to the moment of sharing, though uploaded files and raw data from connected tools are excluded. Team and Enterprise accounts cannot share publicly, but individual users can.
What was exposed
Developers flagged that wallet details and login credentials appeared among the search results. Some users reported being able to read strangers' chats through Brave Search. Leaked private keys pose a particular risk because, unlike passwords, they cannot be changed. Small wallets are the main target.
Chainalysis reported 158,000 personal wallet hacks in 2025, costing $713 million and affecting 80,000 people. That's up from 54,000 hacks in 2022. No confirmed seed phrase or working key has been found in the indexed chats, and no stolen funds have been reported so far.
Anthropic's response — or lack of one
Anthropic had not addressed the issue as of this article's writing. Users can unshare old links by going to Settings > Privacy > Shared chats. The pages have been removed from search results but still exist online; only the owner can stop access by unsharing.
Some developers argued that the pages were public by choice, but the indexing caught many users off guard. A similar incident occurred in September 2025 when just under 600 Claude chats were indexed by Google, as reported by Forbes.
Industry context and a possible fix
OpenAI dropped its public sharing option a month earlier and now faces a ChatGPT data sharing lawsuit. A suggested fix for Anthropic is to let Google open the share pages and then add the hide tag, which would prevent indexing while still allowing the page to exist.
For now, the exposed chats remain accessible to anyone who finds the URLs. The question is whether Anthropic will implement a technical fix before the next wave of indexing hits.
