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.
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Fixes

Solution

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Workaround

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History

Fri, 02 Oct 2026 10:15:00 +0000

Type Values Removed Values Added
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.
Title Apache Directory LDAP API: Denial of service via excessive bcrypt cost factor in stored passwords
Weaknesses CWE-405
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-02T10:03:48.296Z

Reserved: 2026-10-01T13:05:10.819Z

Link: CVE-2026-103880

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-02T10:17:06.700

Modified: 2026-10-02T10:17:06.700

Link: CVE-2026-103880

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-02T11:30:18Z

Weaknesses