CVE-2026-103880: Apache Software Foundation Apache Directory LDAP API

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API. Storing a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to  run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS. This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9. Users are recommended to upgrade to version 2.1.9, which fixes the issue.

Affected products

• Apache Software Foundation Apache Directory LDAP API: from 2.1.0, before 2.1.9 (fixed in 2.1.9)

Published 2026-10-02. Last modified 2026-10-05.