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CVE-2026-11326

MEDIUM
6
CVSS Score
Published: June 5, 2026 at 12:12 AM UTC
Updated: July 23, 2026 at 07:35 AM UTC
1 product affected across 1 vendorAtlas

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Severity
MEDIUM6
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Atlas· Openai
60%
v < 1.2025.288.15
Affected range stops below 1.2025.288.15, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Technical Description
Source: cverecord
https://www.hacktron.ai/blog/hacking-openai-atlas-browser

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6MEDIUMOAI
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-284

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