(Pwn2Own) OpenAI Codex External Control of System or Configuration Setting Remote Code Execution Vulnerability

September 10th, 2026
ZDI-26-651 ZDI-CAN-31264

CVE ID

CVE-2026-19593

CVSS Score

7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors

OpenAI

Affected Products

Codex

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenAI Codex. User interaction is required to exploit this vulnerability in that the target must open a malicious folder.

The specific flaw exists within the handling of configuration files. The issue results from the lack of proper sanitization of configuration settings. An attacker can leverage this vulnerability to execute code in the context of the current user.

Additional Details

OpenAI has issued an update to correct this vulnerability. More details can be found at:
https://www.cve.org/CVERecord?id=CVE-2026-19593

Disclosure Timeline

  • 2026-06-02 - Vulnerability reported to vendor
  • 2026-09-10 - Coordinated public release of advisory
  • 2026-09-10 - Advisory Updated

Credit

Ikotas Labs, Inc. (Satoki Tsuji)

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