CVE-2026-103885
High
Description
Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API. A LDAP server using the LDAP API (like Apache DS) may consume 100% of a CPU core indefinitely when processing some badly crafted Telephone Numbers. 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-400Uncontrolled resource consumption
How to fix
Update
- Apache Software Foundation Apache Directory LDAP API2.1.9 or later
Vendor advisories
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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