CVE-2026-112305CWE-915

CVE-2026-112305

High · published October 19, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
46.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
8.7 · 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
EPSS
0.00563 · 46.1th percentile
Weakness
CWE-915 · Improperly Controlled Modification of Dynamically-Determined Object Attributes
Published
2026-10-19T20:17Z
References (5)
https://github.com/semaphoreui/semaphore · [email protected]https://github.com/semaphoreui/semaphore/blob/v2.19.16/api/projects/tasks.go#L39-L75 · [email protected]https://github.com/semaphoreui/semaphore/blob/v2.19.16/services/tasks/TaskRunner.go#L395-L431 · [email protected]https://github.com/semaphoreui/semaphore/pull/3888 · [email protected]https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.16-rce-via-task-environment-ansible-variable-override · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 19 OCT 15:28Z
    Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override
    cvelistv5
  • 19 OCT 15:28Z
    Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override
    cvelistv5