Is CVE-2026-31864 actively exploited?

No active exploitation of CVE-2026-31864 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31864 be exploited remotely?

Yes. CVE-2026-31864 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31864?

CVE-2026-31864 has a CVSS score of 6.8 (MEDIUM).

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MEDIUM

CVE-2026-31864

CWE-1336Published: March 13, 2026· Updated: Mar 18, 2026

6.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-31864 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.