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.

Project Subscriptions

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Fixes

Solution

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Workaround

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History

Sat, 03 Oct 2026 03:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Sat, 03 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-835
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Fri, 02 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
References

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

Type Values Removed Values Added
First Time appeared Apache
Apache directory Ldap Api
Vendors & Products Apache
Apache directory Ldap Api

Fri, 02 Oct 2026 11:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

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

Type Values Removed Values Added
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.
Title Apache Directory LDAP API: Denial of service via crafted telephone number values
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-02T21:07:24.537Z

Reserved: 2026-10-01T13:23:38.750Z

Link: CVE-2026-103885

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-02T10:17:06.833

Modified: 2026-10-02T22:16:53.870

Link: CVE-2026-103885

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-02T10:09:51Z

Links: CVE-2026-103885 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-03T04:30:19Z

Weaknesses