Improper input validation in Seppmail Secure Email Gateway

CVE-2026-29144

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to bypass subject sanitization and forge security tags using Unicode lookalike characters.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.001 (17.4th percentile) — read the EPSS interpretation.

Affected products

Seppmail Secure Email Gateway — versions 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

downloads.seppmail.com/extrelnotes/150/ERN15.0.html (release-notes)