Medium severity · published Aug 17, 2026
CVE-2026-44845
JumpServer: Remote Command Execution (RCE) via Jinja Template Injection in Applet Host Deployment
6.7
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JU
jumpserver · jumpserver
< 4.10.17 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44845
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44845
github.com
https://github.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59
github.com
https://github.com/jumpserver/jumpserver/pull/16749
github.com
https://github.com/jumpserver/jumpserver/pull/16886
github.com
https://github.com/jumpserver/jumpserver/releases/tag/v4.10.17
github.com
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-22h6-pcgh-9v7q
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