CVE-2026-103878

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductApache Directory LDAP API

PublishedOct 2, 2026

First seenOct 2, 2026

Weakness typeCWE-345CWE-345

How to fix

Update

Apache Software Foundation Apache Directory LDAP API2.1.9 or later

Vendor advisories

lists.apache.org/thread.html/d98f9w01nd3zmkwrr21y0l9kdr9jpty9

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache Directory LDAP API	2.1.0 ≤ v < 2.1.9	2.1.9

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