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.
Published: 2026-10-19
Score: 8.7 High
EPSS: n/a
KEV: No
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Remediation

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History

Mon, 19 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override
Weaknesses CWE-915
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T15:28:55.694Z

Reserved: 2026-10-19T14:14:28.042Z

Link: CVE-2026-112305

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-19T16:17:06.400

Modified: 2026-10-19T16:17:06.523

Link: CVE-2026-112305

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-915

    Improperly Controlled Modification of Dynamically-Determined Object Attributes