CVE-2026-103885
Published:October 02, 2026
Updated:October 13, 2026
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
https://github.com/apache/directory-ldap-api.git (GITHUB):
Affected version(s) >=2.1.0 <2.1.9Fix Suggestion:
Update to version 2.1.9org.apache.directory.api:api-all (JAVA):
Affected version(s) >=2.1.0 <2.1.9Fix Suggestion:
Update to version 2.1.9org.apache.directory.api:api-ldap-model (JAVA):
Affected version(s) >=2.1.0 <2.1.9Fix Suggestion:
Update to version 2.1.9Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Resource Consumption
EPSS
Base Score:
0.49