---
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: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-835
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: '2026-10-08'
sourceUpdated: '2026-10-08T13:17:12.437'
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
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/02/8'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-103885.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-103885'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2545002'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-103885'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103885'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-07T20:54:48.006563Z'
epss: 0.00433
epssPercentile: 0.37436
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.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Fuse 7 · no fix planned: Red Hat Fuse 7 · updated 2026-10-02 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-103885.json)