CVE-2026-104126: JumpServer: Ansible Automation Template Rendering Allows Unsafe Lookup Plugin Invocation
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
JumpServerto a version that resolves this vulnerability.Fixed in 4.10.17-lts
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be an authenticated JumpServer user with permission to create or execute affected Ansible automation tasks. It does not provide unauthenticated access.
What could exploitation expose or allow?
Crafted template content can invoke Ansible file, pipe, env, and password lookups in the Ansible execution context. This can disclose files or environment values and may allow limited command execution with the privileges of the automation process.
Are unrelated JumpServer assets directly accessible through this issue?
No. The issue does not grant direct access to unrelated JumpServer assets.
Which versions are affected and what version fixes it?
JumpServer versions before 4.10.17-lts are affected. The issue is fixed in 4.10.17-lts.