CVE-2026-103552: Apache Software Foundation Apache Directory LDAP API

High severity, CVSS 7.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Stack Overflow vulnerability in Apache Directory LDAP API. Before binding, a client can send a deeply nested search filter that overflows the stack in the server's decoder. This issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9. Users are recommended to upgrade to version 1.2.9, which fixes the issue.

Affected products

• Apache Software Foundation Apache Directory LDAP API: from 1.2.0, before 1.2.9 (fixed in 1.2.9)

Published 2026-10-02. Last modified 2026-10-02.