CVE-2026-45406 Dokku: Host RCE via Maliciously Named OpenResty Include Files Injected Through eval

Critical 9.0 Published 26 Jun 2026 Updated 26 Jun 2026

Attackers can execute arbitrary commands on the host by using malicious filenames in OpenResty include files during deployment.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-45406?

CVE-2026-45406 is a critical command injection vulnerability in dokku, published on 26 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Dokku is a docker-powered PaaS. Prior to 0.38.2, the openresty-vhosts plugin copies files from an app's openresty/http-includes/ git repository directory to the host and then interpolates their filenames, unescaped, into a single-quoted shell string that is later parsed by eval. A filename containing a single quote breaks the quoting and allows command substitution to execute arbitrary commands on the host as the dokku user during the app's next deploy. This vulnerability is fixed in 0.38.2.

Weakness: CWE-95

Which versions are affected by CVE-2026-45406?

It affects 1 product.

Products include Dokku Dokku.

How do I fix CVE-2026-45406?

No fix has been published for CVE-2026-45406 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-2026-45406 being exploited?

There is no known exploitation of CVE-2026-45406 in the wild and no public exploit code.

Sources

Also known as GHSA-ggqh-98fj-8mg9.