CVE-2026-44129

Server-side template injection

HIGH

8.3

CVSS Score

Published: May 8, 2026 at 01:14 PM UTC

Updated: October 26, 2026 at 06:10 PM UTC

1 product affected across 1 vendorSecure Email Gateway

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Severity

HIGH8.3

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Secure Email Gateway · Seppmail

90%

v < 15.0.4

Affected range stops below 15.0.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord

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

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.3HIGHNCSC.ch

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-1336

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