CVE-2026-103878

Apache Directory LDAP API: Injection of plaintext responses during StartTLS

Published Oct 2, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache directory Ldap Api
Vendors & Products Apache
Apache directory Ldap Api
Type Values Removed Values Added
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.
Title Apache Directory LDAP API: Injection of plaintext responses during StartTLS
Weaknesses CWE-345
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Oct 5, 2026, 6:48 PM
Reserved
Oct 1, 2026, 12:58 PM
Status
Deferred
Published
Oct 2, 2026, 10:17 AM
Modified
Oct 5, 2026, 7:17 PM