CVE-2026-103880: CWE-405 Asymmetric Resource Consumption (Amplification) in Apache Software Foundation Apache Directory LDAP API
CVE-2026-103880 is an asymmetric resource consumption vulnerability in the Apache Directory LDAP API. When storing a password using the bcrypt algorithm with a high computational cost factor (e.g., 30), the LDAP server's CPU usage can spike and run for hours during credential verification. This can lead to a denial of service condition. The issue affects versions from 2.1.0 up to but not including 2.1.9. Upgrading to version 2.1.9 resolves the vulnerability.
AI Analysis
Technical Summary
This vulnerability (CWE-405) in Apache Directory LDAP API arises from the use of bcrypt password hashing with an excessively high cost factor. The server's CPU is heavily taxed when verifying credentials, potentially causing prolonged processing times and denial of service. The affected versions are >=2.1.0 and <2.1.9. The vendor fixed the issue in version 2.1.9 by enforcing a bounded cost to prevent excessive resource consumption.
Potential Impact
An attacker could exploit this vulnerability by causing the LDAP server to perform extremely costly bcrypt computations, leading to high CPU usage and effectively a denial of service. This could degrade or disrupt authentication services relying on the LDAP server.
Mitigation Recommendations
Users should upgrade Apache Directory LDAP API to version 2.1.9 or later, where the issue is fixed by enforcing a bounded bcrypt cost factor. No other mitigation is required once the upgrade is applied.
CVE-2026-103880: CWE-405 Asymmetric Resource Consumption (Amplification) in Apache Software Foundation Apache Directory LDAP API
Description
CVE-2026-103880 is an asymmetric resource consumption vulnerability in the Apache Directory LDAP API. When storing a password using the bcrypt algorithm with a high computational cost factor (e.g., 30), the LDAP server's CPU usage can spike and run for hours during credential verification. This can lead to a denial of service condition. The issue affects versions from 2.1.0 up to but not including 2.1.9. Upgrading to version 2.1.9 resolves the vulnerability.
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.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-405) in Apache Directory LDAP API arises from the use of bcrypt password hashing with an excessively high cost factor. The server's CPU is heavily taxed when verifying credentials, potentially causing prolonged processing times and denial of service. The affected versions are >=2.1.0 and <2.1.9. The vendor fixed the issue in version 2.1.9 by enforcing a bounded cost to prevent excessive resource consumption.
Potential Impact
An attacker could exploit this vulnerability by causing the LDAP server to perform extremely costly bcrypt computations, leading to high CPU usage and effectively a denial of service. This could degrade or disrupt authentication services relying on the LDAP server.
Mitigation Recommendations
Users should upgrade Apache Directory LDAP API to version 2.1.9 or later, where the issue is fixed by enforcing a bounded bcrypt cost factor. No other mitigation is required once the upgrade is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-10-01T13:05:10.819Z
- State
- PUBLISHED
Threat ID: 6abf880ca43b0b3b89a3f5f0
Added to database: 10/02/2026, 10:31:40 UTC
Last enriched: 10/02/2026, 10:46:25 UTC
Last updated: 10/02/2026, 11:32:43 UTC
Views: 5
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