What’s Vulnerable › Vulnerabilities

CVE-2026-44845: JumpServer: Remote Command Execution (RCE) via Jinja Template Injection in Applet Host Deployment

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-17 · updated 2026-09-09
• Weakness: CWE-1336

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.

Affected products

• jumpserver: before 4.10.17

References

• https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59
• https://github.com/jumpserver/jumpserver/pull/16749
• https://github.com/jumpserver/jumpserver/pull/16886
• https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17
• https://github.com/jumpserver/jumpserver/security/advisories/GHSA-22h6-pcgh-9v7q
• https://github.com/jumpserver/jumpserver/security/advisories/GHSA-22h6-pcgh-9v7q

Get alerted when CVE-2026-44845 or the next vulnerability affects your stack