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TI-2026-09776 Aliases CVE-2026-11326GHSA-x355-jg5j-p4h6

Improper access control in OpenAI Atlas

Priority LOW 26CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
High
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00214 11th percentileScored 2026-11-07
Fix Fixed OpenAI Atlas (OpenAI): 1.2025.288.15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenAIOpenAI Atlasbefore 1.2025.288.151.2025.288.15Patch availableCNA
  • OpenAI Atlas VendorOpenAI Affected before 1.2025.288.15 Fixed in 1.2025.288.15 Patch available CNA

Remediation

  • Fix · CNA OpenAI Atlas (OpenAI) Fixed in 1.2025.288.15

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11326
  2. 2026-10-03 Alias added: GHSA-x355-jg5j-p4h6

References

Other 1

  • TI-2026-15921 OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS… CVSS 3.1HIGH 7.3
  • TI-2025-06388 OpenAI Operator - API Spoofing through Locking Operator on FullScreen CVSS 4.0MEDIUM 6.9
  • TI-2026-15922 OpenAI Codex Desktop for Windows and macOS automatically inspected Git metadata and… CVSS 3.1CRITICAL 9.8
  • TI-2026-15920 OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS… CVSS 3.1HIGH 8.8
  • TI-2025-37063 Codex has sandbox bypass due to bug in path configuration logic CVSS 4.0HIGH 8.6
  • TI-2026-85640 Argument injection in Codex Desktop for Windows project paths CVSS 3.1HIGH 8.0
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences