---
title: "CVE-2026-112305: Semaphore UI - Remote Code Execution"
description: "Semaphore UI through 2.19.16 contains a remote code execution caused by task_runner role users overriding protected Ansible variables via task environment JSON, letting attackers execute commands as the Semaphore server user, exploit requires task_runner role."
url: https://panop.io/threat-heartbeat/CVE-2026-112305/
---

# CVE-2026-112305 Semaphore UI - Remote Code Execution

Semaphore UI through 2.19.16 contains a remote code execution caused by task\_runner role users overriding protected Ansible variables via task environment JSON, letting attackers execute commands as the Semaphore server user, exploit requires task\_runner role.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-112305)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

19 October 2026

Updated

20 October 2026

Weakness

[CWE-915](https://cwe.mitre.org/data/definitions/915.html)

## Vendor fix

Update to the latest version beyond 2.19.16.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-112305](https://nvd.nist.gov/vuln/detail/CVE-2026-112305)
- [https://github.com/semaphoreui/semaphore/pull/3888](https://github.com/semaphoreui/semaphore/pull/3888)
- [https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.16-rce-via-task-environment-ansible-variable-override](https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.16-rce-via-task-environment-ansible-variable-override)
- [https://github.com/semaphoreui/semaphore](https://github.com/semaphoreui/semaphore)
- [https://github.com/semaphoreui/semaphore/blob/v2.19.16/api/projects/tasks.go#L39-L75](https://github.com/semaphoreui/semaphore/blob/v2.19.16/api/projects/tasks.go#L39-L75)
- [https://github.com/semaphoreui/semaphore/blob/v2.19.16/services/tasks/TaskRunner.go#L395-L431](https://github.com/semaphoreui/semaphore/blob/v2.19.16/services/tasks/TaskRunner.go#L395-L431)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)