CVE-2026-44129 HIGH

CVE-2026-44129: Server-side template injection

Vendor Seppmail Ag
Product Secure Email Gateway
Weakness CWE-1336
Published May 8, 2026
Last update May 18, 2026
View on NVD All CVEs

CVSS base score

8.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

SEPPmail Secure Email Gateway before version 15.0.4 contains a server-side template injection vulnerability in the new GINA UI because an endpoint accepts attacker-controlled template, allowing remote attackers to execute arbitrary template expressions and potentially achieve remote code execution depending on the enabled template plugins.

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 18, 2026 Record updated