CVE-2026-19593 Command injection in Codex Desktop
Attacker-controlled Git config in a workspace triggers arbitrary code execution outside the sandbox, allowing file access and modification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19593?
CVE-2026-19593 is a critical command injection vulnerability in OpenAI Codex Desktop, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenAI Codex Desktop for Windows and macOS automatically inspected Git metadata and working-tree status when a user opened a workspace. If the workspace contains a repository with preserved attacker-controlled .git/config, the attr.tree setting and a configured clean or process filter can cause Git to run an attacker-controlled program. The program runs outside Codex's command sandbox with the signed-in user's privileges, without a workspace-trust prompt, command approval, or interaction with a model. The attacker can read, modify, or delete files and access credentials available to that user. Exploitation requires Git to be available on PATH and the user to open the attacker-prepared repository with its local Git configuration intact. An ordinary Git clone does not copy the source repository's .git/config and is not sufficient by itself.
Weakness: CWE-15
Which versions are affected by CVE-2026-19593?
How do I fix CVE-2026-19593?
No fix has been published for CVE-2026-19593 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-19593 being exploited?
There is no known exploitation of CVE-2026-19593 in the wild and no public exploit code.
Sources
Also known as GHSA-hcf6-9q9g-xx3c.