ZDI-26-651: (Pwn2Own) OpenAI Codex External Control of System or Configuration Setting Remote Code Execution Vulnerability
ZDI published advisory ZDI-26-651 for a CVSS 7.8 remote code execution flaw (CVE-2026-19593) in OpenAI Codex, demonstrated at Pwn2Own.
The Zero Day Initiative published advisory ZDI-26-651 describing a remote code execution vulnerability in OpenAI Codex, tracked as CVE-2026-19593 with a CVSS 7.8 score. The flaw involves external control of system or configuration settings. Exploitation requires user interaction, as the target must open a malicious folder. The bug was demonstrated at Pwn2Own and disclosed through ZDI.
- Remote attacker can execute arbitrary code in OpenAI Codex via external control of system or configuration settings.
- CVSS 7.8; exploitation requires the target to open a malicious folder.
- Disclosed through ZDI as a Pwn2Own result; no in-the-wild exploitation reported.
- CVEs
- CVE-2026-19593
- Vendors
- OpenAI
- Products
- Codex
- Organizations
- Zero Day Initiative
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-19593 | RCE via Attacker-Controlled Git Config in OpenAI Codex Desktop (Windows/macOS) | 9.8 | <1% |
From the original article
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 ZDI has assigned a CVSS rating of 7.
zerodayinitiative.com
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