CVE-2026-44129

HIGH

SEPPmail Secure Email Gateway - Server-Side Template Injection

Title source: manual

Description

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.

References (2)

Core 2

Core References

https://downloads.seppmail.com/extrelnotes/150/ERN15.0.html#security

https://labs.infoguard.ch/posts/seppmail_secure_e-mail_gateway_rce_vulnerabilities_cve-2026-2743_cve-2026-7864_cve-2026-44127_cve-2026-44128/

Scores

CVSS v4 8.3

EPSS 0.0053

EPSS Percentile 40.7%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-1336

Status published

Products (1)

SEPPmail AG/Secure Email Gateway < 15.0.4

Published May 08, 2026

Tracked Since May 08, 2026