CVE-2026-11326

Currently unrated

Key Information:

Vendor

Openai

Status
Openai Atlas
Vendor
CVE Published:
5 June 2026

What is CVE-2026-11326?

OpenAI Atlas before 1.2025.288.15 exposed privileged browser APIs to web content on *.openai.com origins. A cross-site scripting vulnerability in forum.openai.com could be used to access these functions, allowing access to browser history information and the ability to open or close tabs. OpenAI Atlas 1.2025.288.15 narrows access to these APIs to *.chatgpt.com; users should upgrade to 1.2025.288.15 or later.

Affected Version(s)

OpenAI Atlas 0 < 1.2025.288.15

References

https://www.hacktron.ai/blog/hacking-openai-atlas-browser
technical-description

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

s1r1us and sudi of hacktron.ai
.