CVE-2026-44129
High
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.
SeverityHigh
CVSS8.3
Exploit probability—
ProductSecure Email Gateway
PublishedMay 8, 2026
First seenMay 8, 2026
Weakness typeCWE-1336CWE-1336
How to fix
Update
- SEPPmail AG Secure Email Gateway15.0.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| SEPPmail AG Secure Email Gateway | v < 15.0.4 | 15.0.4 |
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