{"id":"CVE-2026-112305","title":"Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override","summary":"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 …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-915"],"vendor":"semaphoreui","product":"Semaphore UI","affected":["semaphore_ui <= 2.19.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-19T17:38:35.032280Z"},"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T17:40:14.094Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112305","references":[{"url":"https://github.com/semaphoreui/semaphore/pull/3888"},{"url":"https://github.com/semaphoreui/semaphore/blob/v2.19.16/services/tasks/TaskRunner.go#L395-L431"},{"url":"https://github.com/semaphoreui/semaphore/blob/v2.19.16/api/projects/tasks.go#L39-L75"},{"url":"https://github.com/semaphoreui/semaphore"},{"url":"https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.16-rce-via-task-environment-ansible-variable-override","label":"VulnCheck Advisory: Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T16:32:30.081Z","slug":"CVE-2026-112305","body":"## Overview\n\nSemaphore 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.\n\n## Affected\n\n- `semaphore_ui <= 2.19.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}