CVE-2026-112305 Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override
Users with task_runner role can execute arbitrary commands as the server user by overriding protected Ansible variables in task environments.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-112305?
CVE-2026-112305 is a high-severity code injection vulnerability in semaphoreui Semaphore UI, published on 19 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Semaphore UI through 2.19.16 contains a remote code execution vulnerability that allows users with the task_runner role to override protected Ansible variables by supplying arbitrary keys in the task environment JSON. Attackers can POST tasks setting ansible_ssh_common_args with a ProxyCommand or ansible_connection=local to execute commands as the Semaphore server user, exposing encryption keys, SSH keys and stored secrets.
Weakness: CWE-915
Which versions are affected by CVE-2026-112305?
How do I fix CVE-2026-112305?
No fix has been published for CVE-2026-112305 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-2026-112305 being exploited?
There is no known exploitation of CVE-2026-112305 in the wild and no public exploit code.
Sources
Also known as GHSA-6cr7-7xqc-c37c.