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CVE-2026-104126— JumpServer: Ansible Automation Template Rendering Allows Unsafe Lookup Plugin Invocation

Quick assessment

Affected
jumpserver jumpserver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

JumpServer 是一款开源的堡垒机及运维安全审计系统。在 4.10.17-lts 版本之前，JumpServer 基于 Ansible 的自动化渲染功能存在安全隐患，允许具有创建或执行受影响自动化任务权限的攻击者注入并评估其控制的模板表达式。构造恶意内容可在 Ansible 执行上下文中调用敏感的 Ansible 查找插件行为（如 file、pipe、env、password 查找等），从而导致敏感文件或环境变量泄露，并可能在自动化进程的权限范围内实现有限的命令执行。该漏洞不提供未认证访问权限，也不直接导致对

CVSS 6.0 · Medium EPSS 0.38% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
jumpserver jumpserver < 4.10.17 affected
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I. Basic Information for CVE-2026-104126

Vulnerability Information
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Vulnerability Title
JumpServer: Ansible Automation Template Rendering Allows Unsafe Lookup Plugin Invocation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
jumpserver jumpserver < 4.10.17 -

II. Public POCs for CVE-2026-104126

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III. Intelligence Information for CVE-2026-104126

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Patches & Fixes for CVE-2026-104126 (1)

Vendor Advisories for CVE-2026-104126 (1)

Vendor Pages for CVE-2026-104126 (1)

IV. Related Vulnerabilities

Same product: jumpserver
Same vendor: jumpserver
Same weakness: CWE-94

V. Comments for CVE-2026-104126

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