Vulnerability in Fit2cloud Jumpserver
CVE-2026-31864
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 c…
EPSS: 0.003 (27.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Fit2cloud Jumpserver
- Jumpserver — versions < 3.10.22, >= 4.0.0, < 4.10.16
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2026-31864?
- CVE-2026-31864 is a medium-severity vulnerability in Fit2cloud Jumpserver, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 6.8/10. Published 2026-03-13.
- How severe is CVE-2026-31864?
- Medium severity. CVSS v3 base score is 6.8 out of 10.