LDAP Injection Affecting dovecot package, versions [,2.4.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 Mar 2026
- disclosed27 Mar 2026
- creditUnknown
Introduced: 27 Mar 2026
CVE-2026-27860 (opens in a new tab)How to fix?
Upgrade dovecot to version 2.4.3 or higher.
Overview
Affected versions of this package are vulnerable to LDAP Injection via the authentication process when the auth_username_chars configuration setting is empty. An attacker can bypass authentication restrictions and gain unauthorized access to information about the LDAP directory structure by injecting malicious LDAP filters during authentication. This is only exploitable if the auth_username_chars configuration is set to an empty value.