CVE-2026-67179 Genkit improper host header validation
Attackers on the local network or via DNS rebinding can execute arbitrary Genkit actions and read results on the Dev UI server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-67179?
CVE-2026-67179 is a high-severity missing authorization vulnerability in genkit-ai genkit, published on 11 Aug 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
Genkit does not properly validate host request headers. Any host on the developer's network, and any website the developer visits (via DNS rebinding), can reach POST /api/runAction on the Dev UI server (default port 4000) and execute any registered Genkit action and read the result. Fixed on 2026-06-18.
Weakness: CWE-644
Which versions are affected by CVE-2026-67179?
How do I fix CVE-2026-67179?
No fix has been published for CVE-2026-67179 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-67179 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67179 exists.
Sources
Also known as GHSA-vj3w-h7v3-5rpr.