CVE-2026-11326
Medium
Description
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.
SeverityMedium
CVSS6.0
Exploit probability—
Product
OpenAI Atlas
PublishedJun 5, 2026
First seenJun 5, 2026
Weakness typeCWE-284Improper access control
How to fix
Update
- OpenAI OpenAI Atlas1.2025.288.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| OpenAI OpenAI Atlas | v < 1.2025.288.15 | 1.2025.288.15 |
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