CVE-2026-29131 PGP Decryption Recipient LDAP Injection

What is CVE-2026-29131?

CVE-2026-29131 is a medium-severity vulnerability in SEPPmail Secure Email Gateway, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

SEPPmail Secure Email Gateway before version 15.0.3 allows attackers with a specially crafted email address to read the contents of emails encrypted for other users.

Weakness: CWE-90

Which versions are affected by CVE-2026-29131?

It affects 1 product.

Products include Seppmail Secure Email Gateway.

How do I fix CVE-2026-29131?

No fix has been published for CVE-2026-29131 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-29131 being exploited?

There is no known exploitation of CVE-2026-29131 in the wild and no public exploit code.

Other vulnerabilities in SEPPmail Secure Email Gateway

• CVE-2026-29139 GINA State Confusion Account Takeover High 7.8
• CVE-2026-29143 S/MIME Decryption Impersonation High 7.8
• CVE-2026-29144 Unicode Subject Tags High 7.8
• CVE-2026-29140 S/MIME Signature Additional Certificate High 7.7
• CVE-2026-29141 Bounded Subject Tag Sanitization High 7.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-69rr-jvgq-g678.