ZDI-26-968: (Pwn2Own) OpenAI Codex GUI OpenProjectInCodex Argument Injection Remote Code Execution Vulnerability
Source Zero Day Initiative
Not known to be exploited · CVSS 8.0 High.
Data as of 13 Nov 2026, 20:34 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 8.0 |
|---|
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 5 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| OpenAICodex Desktop for Windows | Affected
| Fixed in– |
| OpenAICodex Desktop for Windows (Microsoft Store/MSIX package) | Affected
| Fixed in– |
AI-suggested
Since user interaction is required, educating users to avoid opening untrusted files may reduce risk until an official fix is available.
Description
A remote code execution vulnerability exists in OpenAI Codex via the OpenProjectInCodex argument injection. Exploitation requires user interaction, specifically opening a malicious file. The vulnerability has a high severity rating of 7.8 assigned by ZDI and is tracked as CVE-2026-110930.