CVE-2026-103880

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductApache Directory LDAP API

PublishedOct 2, 2026

First seenOct 2, 2026

Weakness typeCWE-405CWE-405

How to fix

Update

Apache Software Foundation Apache Directory LDAP API2.1.9 or later

Vendor advisories

lists.apache.org/thread.html/39q63m54v9go6xj7pqj7q18c3szn9go4

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache Directory LDAP API	2.1.0 ≤ v < 2.1.9	2.1.9

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