CVE-2026-44845 JumpServer: Remote Command Execution (RCE) via Jinja Template Injection in Applet Host Deployment
An authenticated administrator can inject Jinja2 expressions to execute arbitrary commands on the JumpServer control node during Applet Host deployment.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44845?
CVE-2026-44845 is a medium-severity code injection vulnerability in jumpserver, published on 17 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17, an authenticated administrator with Applet Host management and deployment permissions can inject Jinja2 expressions into the IP/Host field or Core Service Address field, causing Ansible to evaluate ansible_host inventory data or playbook variables during Applet Host deployment and execute arbitrary commands on the JumpServer control node. This issue is fixed in version 4.10.17.
Weakness: CWE-1336
Which versions are affected by CVE-2026-44845?
How do I fix CVE-2026-44845?
No fix has been published for CVE-2026-44845 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-44845 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44845 exists.
Sources
Also known as GHSA-22h6-pcgh-9v7q.