---
id: CVE-2026-103885
title: "Asymmetric Resource Consumption\_vulnerability in Apache Directory LDAP API.\n\n\n\nA LDAP server using the LDAP API (like Apache DS)\_may consume 100% of a CPU core indefinitely\_when processing some badly crafted Telephone Numbers.\n\n\n\nThis is…"
summary: "Asymmetric Resource Consumption\_vulnerability in Apache Directory LDAP API.\n\n\n\nA LDAP server using the LDAP API (like Apache DS)\_may consume 100% of a CPU core indefinitely\_when processing some badly crafted Telephone Numbers.\n\n\n\nThis is…"
severity: none
vendor: Apache Software Foundation
product: 'org.apache.directory.api:api-ldap-model'
affected:
  - 'org.apache.directory.api:api-ldap-model >= 2.1.0 < 2.1.9'
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T10:17:06.833'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103885'
references:
  - url: 'https://lists.apache.org/thread.html/wjt9p1l123v6b3zd5dg41f8lfrgy5vg9'
    label: security@apache.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T10:15:55.895Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.