---
id: CVE-2026-104126
title: >-
  JumpServer is an open source bastion host and an operation and maintenance
  security audit system
summary: >-
  JumpServer is an open source bastion host and an operation and maintenance
  security audit system. Prior to 4.10.17-lts, JumpServer's Ansible-based
  automation rendering can evaluate attacker-controlled template expressions
  from users who …
severity: medium
cvss: 6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L'
cwe:
  - CWE-94
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T17:17:15.747'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104126'
references:
  - url: >-
      https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59
    label: security-advisories@github.com
  - url: 'https://github.com/jumpserver/jumpserver/pull/16886'
    label: security-advisories@github.com
  - url: 'https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17'
    label: security-advisories@github.com
  - url: >-
      https://github.com/jumpserver/jumpserver/security/advisories/GHSA-gr5x-5c4h-867g
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-13T17:38:53.177Z'
---

## Overview

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17-lts, JumpServer's Ansible-based automation rendering can evaluate attacker-controlled template expressions from users who have permission to create or execute affected automation tasks. Crafted content can invoke sensitive Ansible lookup behavior, including file, pipe, env, and password lookups, within the Ansible execution context, which can disclose files or environment values and may permit limited command execution under the privileges of the automation process. The issue does not provide unauthenticated access or direct access to unrelated JumpServer assets. This issue is fixed in version 4.10.17-lts.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.