CVE-2026-29142 Plaintext secure-mail.html

Medium 6.3 Published 2 Apr 2026 Updated 2 Apr 2026

An attacker can forge GINA-encrypted emails due to plaintext exposure in the secure-mail.html file, bypassing email security controls.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-29142?

CVE-2026-29142 is a medium-severity vulnerability in SEPPmail Secure Email Gateway, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker to forge a GINA-encrypted email.

Weakness: CWE-325

Which versions are affected by CVE-2026-29142?

It affects 1 product.

Products include Seppmail Secure Email Gateway.

How do I fix CVE-2026-29142?

No fix has been published for CVE-2026-29142 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-29142 being exploited?

There is no known exploitation of CVE-2026-29142 in the wild and no public exploit code.

Sources

Also known as GHSA-wph3-c8fm-q2v8.