CVE-2026-31864

MEDIUM EPSS 26.6%
Published Mar 13, 20263mo ago · Modified Jun 17, 20261w ago
6.8 CVSS 3.1
Medium
Find Similar
Published Mar 13, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

JumpServer is an open source bastion host and an operation and maintenance security audit system. a Server-Side Template Injection (SSTI) vulnerability exists in JumpServer's Applet and VirtualApp upload functionality. This vulnerability can only be exploited by users with administrative privileges (Application Applet Management or Virtual Application Management permissions). Attackers can exploit this vulnerability to execute arbitrary code within the JumpServer Core container. The vulnerability arises from unsafe use of Jinja2 template rendering when processing user-uploaded YAML configuration files. When a user uploads an Applet or VirtualApp ZIP package, the manifest.yml file is rendered through Jinja2 without sandbox restrictions, allowing template injection attacks.

CVSS Details

Base Score
6.8
Exploitability
0.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
26.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-1336

Affected Products 2

VendorProductVersionRange
fit2cloudjumpserver* <3.10.22
fit2cloudjumpserver*≥4.0.0  –  <4.10.16

References 2

  • github.com https://github.com/jumpserver/jumpserver/pull/16608
    Issue Tracking
  • github.com https://github.com/jumpserver/jumpserver/security/advisories/GHSA-qx8h-rx2j-j5wc
    PatchVendor Advisory

Remediation

  • github.com https://github.com/jumpserver/jumpserver/security/advisories/GHSA-qx8h-rx2j-j5wc
    PatchVendor Advisory