CVE-2026-112305

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

ProductSemaphore UI

PublishedOct 19, 2026

First seenOct 19, 2026

Weakness typeCWE-915CWE-915

How to fix

Patches

github.com/semaphoreui/semaphore/pull/3888

Affected products

Product	Affected versions	Fixed in
semaphoreui Semaphore UI	v ≤ 2.19.16	—

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