Telegram has recently discovered a public group chat indexing bot that has captured up to 56 billion user speech data, involving 860 million users and 36 million subscription channels or groups. Currently, the bot does not provide specific speech records of specific users, but any user can query others' historical speech data, join/leave groups, and frequently converse friends in the group, etc.

Most open groups are publicly joinable, which may also be why developers can build spiders to crazily capture these chat records, but for users, this kind of speech capture behavior is somewhat disgusting.

It is still unclear whether Telegram will also take technical measures to defend against such crawling behavior. As mentioned earlier, this is not considered a security vulnerability for users, but it may be a security flaw for Telegram, especially since it is surprising that a spider capturing such a massive amount of data has not been intercepted.