PCMag editors select and review products independently. If you buy through affiliate links, we may earn commissions, which help support our testing.

OpenAI Confirms Leak of ChatGPT Conversation Histories

OpenAI CEO Sam Altman blames the exposure on 'a bug in an open source library.' A patch has been released, but the chat history sidebar remains inaccessible.

 & Michael Kan Principal Reporter

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology.

Our Expert
LOOK INSIDE PC LABS HOW WE TEST
65 EXPERTS
43 YEARS
41,500+ REVIEWS

In a privacy snafu, OpenAI has confirmed that a glitch briefly caused ChatGPT to leak the conversation histories of random users earlier this week.  

“We feel awful about this,” OpenAI CEO Sam Altman tweeted on Wednesday. 

ChatGPT archives and displays your past conversations, giving you a running record of all your text inputs with the program. On Monday morning, some people noticed that the chat history function was showing unfamiliar past conversations seemingly from other people.

ChatGPT also experienced an outage on the same day. Initially, OpenAI remained mum on the situation, but on Wednesday, Altman finally confirmed the data exposure was real. “A small percentage of users were able to see the titles of other users’ conversation history,” he tweeted, without elaborating. 

Although some feared the privacy snafu was caused by a hack, Altman blamed the problem on a software bug in an unnamed “open source library.” The good news is that OpenAI released a patch, which has been validated. But it looks like the company may have lost users’ chat histories for Monday, March 20. 

“Unfortunately, users will not be able to access their chat history from monday 1 am PDT until monday 10 am PDT,” Altman said, the same timeframe the bug occurred. 

The company plans on providing more details through a “technical postmortem,” Altman added. In the meantime, the conversation history sidebar has been down for ChatGPT since Monday.

It remains unclear whether the bug exposed anyone’s sensitive personal information. But Altman’s tweet says only the “titles” of other users’ conversation histories were exposed, not necessarily the full contents. Users who tried to click on the exposed chat histories reported experiencing an error that prevented full disclosure. The leaked titles also contained no apparent indication of who the chat history belonged to.

Despite Altman's tweet, OpenAI has yet to address another apparent bug that caused the payment form for ChatGPT Plus to seemingly leak the email addresses for other users on Monday morning. The company hasn’t responded to requests for comment.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

Read full bio