CVE-2026-103880
Apache Directory LDAP API: Denial of service via excessive bcrypt cost factor in stored passwords
- State
- Published
- Severity
- 7.5 High
- Published
- Oct 2, 2026
- Updated
- Oct 5, 2026
- Reserved
- Oct 1, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CISA-ADP |
Weaknesses
- CWE-405 Asymmetric Resource Consumption (Amplification)
Affected Products
| Product | Versions |
|---|---|
Apache Directory LDAP APIApache Software Foundation |
|
References
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