CVE-2026-11326: CWE-284 Improper Access Control in OpenAI OpenAI Atlas
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.
CVE-2026-11326: CWE-284 Improper Access Control in OpenAI OpenAI Atlas
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.
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OAI
- Date Reserved
- 2026-06-05T00:07:13.696Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a222773e29bf47b5011e3d3
Added to database: 6/5/2026, 1:33:39 AM
Last updated: 6/5/2026, 1:34:29 AM
Views: 1
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