OpenAI has announced new details about why it took ChatGPT offline on Monday, and it’s now saying that some users’ payment information may have been exposed during the incident. According to a post from the company, a bug in an open source library called redis-py created a caching issue that may have shown some active users the last four digits and expiration date of another user’s credit card, along with their first and last name, email address, and payment address. ” It also says that it’s making some changes to its own software and practices to prevent this type of thing from happening again, including adding “redundant checks” to make sure the data being served actually belongs to the user requesting it and reducing the likelihood that its Redis cluster will spit out errors under high loads