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Unrated severityNVD Advisory· Published Jun 5, 2026

CVE-2026-11326

CVE-2026-11326

Description

OpenAI Atlas before 1.2025.288.15 allowed XSS on forum.openai.com to access privileged browser APIs, potentially stealing OAuth tokens and controlling tabs.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

OpenAI Atlas before 1.2025.288.15 allowed XSS on forum.openai.com to access privileged browser APIs, potentially stealing OAuth tokens and controlling tabs.

Vulnerability

OpenAI Atlas versions prior to 1.2025.288.15 exposed privileged browser APIs to web content originating from *.openai.com. A cross-site scripting vulnerability specifically on forum.openai.com allowed malicious web content to interact with these APIs [1].

Exploitation

An attacker can exploit this vulnerability by tricking a user into visiting a malicious link on forum.openai.com. This would allow the attacker's script to access privileged browser APIs, enabling it to monitor user navigation in real-time, capture OAuth tokens for various websites, and potentially control browser tabs [1].

Impact

Successful exploitation allows an attacker to gain access to sensitive information such as browser history and OAuth tokens, which can be used to take over accounts on platforms like Facebook, Reddit, or GitHub. The attacker can also manipulate browser tabs, opening or closing them [1].

Mitigation

Users should upgrade to OpenAI Atlas version 1.2025.288.15 or later. This version restricts access to the privileged APIs to *.chatgpt.com origins, mitigating the vulnerability [1].

References
  1. Pwning OpenAI Atlas Through Exposed Browser Internals

AI Insight generated on Jun 5, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

1

Patches

0

No patches discovered yet.

Vulnerability mechanics

No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.

References

1

News mentions

0

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