CVE-2026-103878
Published:October 02, 2026
Updated:October 09, 2026
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 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-ldap-client-api (JAVA):
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 2.1.9Related 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
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
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
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Insufficient Verification of Data Authenticity
EPSS
Base Score:
0.21