SEPPmail SecureEmailGateway <15.0.3: Email Address Leak of Encrypted Mails
CVE-2026-29131 Published on April 2, 2026
PGP Decryption Recipient LDAP Injection
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.
Vulnerability Analysis
CVE-2026-29131 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Timeline
Vulnerability disclosed to SEPPmail
Version 15.0.3 released 123 days later.
Weakness Type
What is a LDAP Injection Vulnerability?
The software constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component.
CVE-2026-29131 has been classified to as a LDAP Injection vulnerability or weakness.
Products Associated with CVE-2026-29131
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Affected Versions
SEPPmail Secure Email Gateway:- Before 15.0.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.