High severity8.8NVD Advisory· Published Oct 19, 2026· Updated Oct 19, 2026
CVE-2026-112305
CVE-2026-112305
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.
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Affected products
1- Range: <=2.19.16
Patches
Vulnerability mechanics
References
4- github.com/semaphoreui/semaphore/blob/v2.19.16/api/projects/tasks.gonvd
- github.com/semaphoreui/semaphore/blob/v2.19.16/services/tasks/TaskRunner.gonvd
- github.com/semaphoreui/semaphore/pull/3888nvd
- www.vulncheck.com/advisories/semaphore-ui-through-2.19.16-rce-via-task-environment-ansible-variable-overridenvd
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