CVE-2026-19590 Code injection in Codex Desktop
OpenAI Codex Desktop allows arbitrary code execution via malicious Git hooks when opening attacker-controlled repositories, bypassing sandbox restrictions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-19590?
CVE-2026-19590 is a high-severity code injection vulnerability in OpenAI Codex Desktop, published on 1 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OpenAI Codex Desktop for Windows and macOS could execute attacker-controlled Git hooks because automated Git operations trusted the repository's local core.hooksPath setting. If a user opens an attacker-prepared repository whose preserved .git/config points core.hooksPath to an attacker-controlled directory, Codex can run a malicious hook while processing the repository. The hook executes outside Codex's command sandbox, without user approval, and with the user's privileges, allowing it to read, change, or delete the user's files and access other resources available to the user's account. An ordinary Git clone does not preserve the attacker-controlled repository-local configuration required for exploitation.
Weakness: CWE-427
Which versions are affected by CVE-2026-19590?
How do I fix CVE-2026-19590?
No fix has been published for CVE-2026-19590 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-19590 being exploited?
There is no known exploitation of CVE-2026-19590 in the wild and no public exploit code.
Sources
Also known as GHSA-433v-pqvh-w4gj.