Vulnerability in Jtl Software Shop
CVE-2026-54390
JTL Shop versions 5.2.0 through 5.7.1 contains a server-side template injection vulnerability that allows unauthenticated attackers to inject malicious template syntax due to unsanitized user-supplied input passed to the Smarty template en…
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Jtl Software Shop — versions 5.0.0, 5.2.0, 5.4.0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (release-notes, patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-54390?
- CVE-2026-54390 is a critical-severity vulnerability in Jtl Software Shop, classified under Improper Neutralization of Special Elements Used in a Template Engine. CVSS score: 9.8/10. Published 2026-06-18.
- How severe is CVE-2026-54390?
- Critical severity. CVSS v3 base score is 9.8 out of 10.