CVE-2026-19329 andreahaku codex_mcp ask MCP Tool codex-process-simple.ts command injection
Local attackers can execute arbitrary commands via the model argument in the ask MCP Tool of codex_mcp.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19329?
CVE-2026-19329 is a medium-severity command injection vulnerability in andreahaku codex_mcp, published on 9 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in andreahaku codex_mcp up to 1ff521cc6cc57cfe56ddef946c644b8534771390. The affected element is an unknown function of the file src/codex-process-simple.ts of the component ask MCP Tool. The manipulation of the argument model results in command injection. The attack requires a local approach. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-19329?
How do I fix CVE-2026-19329?
No fix has been published for CVE-2026-19329 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-2026-19329 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19329 exists.
Sources
Also known as GHSA-5pgh-4pr5-mhm8.