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OpenAdvisories
High · 7.5 CVE-2026-103878 EUVD-2026-91378GHSA-vmxq-hqjm-cxv7

Apache Directory LDAP API: Injection of plaintext responses during StartTLS

Published Oct 2, 2026 · Updated Oct 5, 2026 · Assigned by apache

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 products

VendorProductAffectedFixed
Apache Software Foundation Apache Directory LDAP API 2.1.0 – < 2.1.9 2.1.9

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 apache-directory-api 2.1.9-1 —
Debian 13 apache-directory-api No fix yet —
Debian 12 apache-directory-api No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 apache-directory-api No fix yet —
Ubuntu 26.04 LTS apache-directory-api No fix yet —
Ubuntu 24.04 LTS apache-directory-api No fix yet —
Ubuntu 22.04 LTS apache-directory-api No fix yet —
Ubuntu 20.04 LTS apache-directory-api No fix yet —
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 18.04 LTS apache-directory-api No fix yet —
Ubuntu 16.04 LTS apache-directory-api No fix yet —

References