---
id: CVE-2026-103878
title: "Cleartext transmission of sensitive information\_vulnerability in Apache Directory LDAP API.\n\n\n\nA StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has…"
summary: "Cleartext transmission of sensitive information\_vulnerability in Apache Directory LDAP API.\n\n\n\nA StartTLS extended operation started after a Search request has been sent can lead to receive data in plain text before the TLS Handshake has…"
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-345
vendor: Apache Software Foundation
product: 'org.apache.directory.api:api-ldap-client-api'
affected:
  - 'org.apache.directory.api:api-ldap-client-api >= 2.1.0 < 2.1.9'
published: '2026-10-02'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T19:17:13.993'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103878'
references:
  - url: 'https://lists.apache.org/thread.html/d98f9w01nd3zmkwrr21y0l9kdr9jpty9'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/10/02/6'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-05T18:47:45.486494Z'
epss: 0.00202
epssPercentile: 0.10071
ingestedAt: '2026-10-02T10:15:55.903Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.