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CriticalCloud and identityOct 31, 2026

ChatGPT Shared Link Flaw Allowed Attackers to Steal Private Chat History

Security researchers discovered a flaw in ChatGPT where opening a malicious shared link could execute attacker code directly inside a user's active session. This vulnerability allowed attackers to access and read private conversation histories belonging to anyone who opened the link. OpenAI resolved the issue within eight days, but the incident highlights significant privacy risks when employees use web-based AI tools for work.

Cloud and identity security briefing

Who is affected

Organizations whose employees use ChatGPT and open shared links from external or unverified sources.

How to mitigate it

  1. 1Instruct employees to avoid clicking ChatGPT share links received from unknown or untrusted senders.
  2. 2Define clear corporate policies restricting the entry of proprietary, client, or sensitive business data into public AI platforms.
  3. 3Implement endpoint web filtering and email security solutions to inspect and block suspicious links before users open them.
  4. 4Review active cloud application permissions and encourage staff to sign out of sensitive web sessions when they are not in use.

How Outsource IT solves this

Our employee security training educates your staff on safe AI adoption and phishing defence so they can spot and avoid malicious links before data is compromised.

Employee Security & Software Training

Tags

ChatGPTAI SecurityData PrivacySession Hijacking

Source advisory: the-hacker-news

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