CVE-2026-103885: Vulnerability in Apache Software Foundation Apache Directory LDAP API
CVE-2026-103885 is an asymmetric resource consumption vulnerability in the Apache Directory LDAP API. The flaw allows an LDAP server using this API to consume 100% of a CPU core indefinitely when processing certain malformed telephone numbers. This affects versions from 2.1.0 up to but not including 2.1.9. The issue is resolved by upgrading to version 2.1.9.
AI Analysis
Technical Summary
The vulnerability in Apache Directory LDAP API versions >=2.1.0 and <2.1.9 causes excessive CPU usage due to malformed telephone number inputs. This leads to indefinite consumption of a full CPU core, impacting server performance. The vendor has fixed this issue in version 2.1.9.
Potential Impact
An attacker can cause a denial of service condition by triggering high CPU usage on an LDAP server using affected versions of the Apache Directory LDAP API. This can degrade or disrupt service availability due to resource exhaustion.
Mitigation Recommendations
Users should upgrade affected Apache Directory LDAP API versions to 2.1.9 or later, where the vulnerability is fixed. No other mitigation is indicated.
CVE-2026-103885: Vulnerability in Apache Software Foundation Apache Directory LDAP API
Description
CVE-2026-103885 is an asymmetric resource consumption vulnerability in the Apache Directory LDAP API. The flaw allows an LDAP server using this API to consume 100% of a CPU core indefinitely when processing certain malformed telephone numbers. This affects versions from 2.1.0 up to but not including 2.1.9. The issue is resolved by upgrading to version 2.1.9.
Affected software
Apache Software Foundation
Apache Directory LDAP API
pkg:maven/Apache Software Foundation/org.apache.directory.api:api-ldap-modelRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Apache Directory LDAP API versions >=2.1.0 and <2.1.9 causes excessive CPU usage due to malformed telephone number inputs. This leads to indefinite consumption of a full CPU core, impacting server performance. The vendor has fixed this issue in version 2.1.9.
Potential Impact
An attacker can cause a denial of service condition by triggering high CPU usage on an LDAP server using affected versions of the Apache Directory LDAP API. This can degrade or disrupt service availability due to resource exhaustion.
Mitigation Recommendations
Users should upgrade affected Apache Directory LDAP API versions to 2.1.9 or later, where the vulnerability is fixed. No other mitigation is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-10-01T13:23:38.750Z
- State
- PUBLISHED
Threat ID: 6abf880ca43b0b3b89a3f5f1
Added to database: 10/02/2026, 10:31:40 UTC
Last enriched: 10/02/2026, 10:46:21 UTC
Last updated: 10/02/2026, 11:29:24 UTC
Views: 4
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