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Vulnerability · Published Oct 2, 2026 · Assigned by apache

CVE-2026-103885Apache Directory LDAP API: Denial of service via crafted telephone number values

High 7.5

In plain English

A high-severity uncontrolled resource consumption in Apache Directory LDAP API from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 62.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12apache-directory-apino fix listedDEBIAN-CVE-2026-103885
Debian:13apache-directory-apino fix listedDEBIAN-CVE-2026-103885
Debian:14apache-directory-apino fix listedDEBIAN-CVE-2026-103885
Ubuntu:22.04:LTSapache-directory-apino fix listedUBUNTU-CVE-2026-103885
Ubuntu:24.04:LTSapache-directory-apino fix listedUBUNTU-CVE-2026-103885
Ubuntu:26.04:LTSapache-directory-apino fix listedUBUNTU-CVE-2026-103885
Ubuntu:26.10apache-directory-apino fix listedUBUNTU-CVE-2026-103885

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Directory LDAP API 2.1.0 – before 2.1.9

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References