CVE-2026-103878: CWE-345 (Insufficient Verification of Data Authenticity) in Apache Software Foundation Apache Directory LDAP API
Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API. A StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has been completed. 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.
AI Analysis
Technical Summary
This vulnerability in Apache Directory LDAP API allows cleartext transmission of sensitive information due to a StartTLS extended operation being started after a Search request has been sent. This sequence can lead to receiving data in plain text before the TLS handshake is completed, violating data authenticity verification (CWE-345). The affected versions are from 2.1.0 up to but not including 2.1.9. The vendor recommends upgrading to version 2.1.9 to address this issue.
Potential Impact
Sensitive information transmitted over LDAP can be exposed in cleartext before the TLS handshake completes, potentially allowing interception of data that should be protected by encryption. This compromises confidentiality and data authenticity during LDAP operations.
Mitigation Recommendations
Upgrade Apache Directory LDAP API to version 2.1.9 or later, which contains the official fix for this vulnerability.
CVE-2026-103878: CWE-345 (Insufficient Verification of Data Authenticity) in Apache Software Foundation Apache Directory LDAP API
Description
Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API. A StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has been completed. 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 software
Apache Software Foundation
Apache Directory LDAP API
pkg:maven/Apache Software Foundation/org.apache.directory.api:api-ldap-client-apiRun 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 in Apache Directory LDAP API allows cleartext transmission of sensitive information due to a StartTLS extended operation being started after a Search request has been sent. This sequence can lead to receiving data in plain text before the TLS handshake is completed, violating data authenticity verification (CWE-345). The affected versions are from 2.1.0 up to but not including 2.1.9. The vendor recommends upgrading to version 2.1.9 to address this issue.
Potential Impact
Sensitive information transmitted over LDAP can be exposed in cleartext before the TLS handshake completes, potentially allowing interception of data that should be protected by encryption. This compromises confidentiality and data authenticity during LDAP operations.
Mitigation Recommendations
Upgrade Apache Directory LDAP API to version 2.1.9 or later, which contains the official fix for this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-10-01T12:58:16.190Z
- State
- PUBLISHED
Threat ID: 6abf880ca43b0b3b89a3f5ef
Added to database: 10/02/2026, 10:31:40 UTC
Last enriched: 10/02/2026, 10:46:28 UTC
Last updated: 10/03/2026, 03:45:56 UTC
Views: 16
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.