CVE-2026-103878 PUBLISHED

Apache Directory LDAP API: Injection of plaintext responses during StartTLS

Assigner: apache
Reserved: 01.10.2026 Published: 02.10.2026 Updated: 02.10.2026

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.

Product Status

Vendor Apache Software Foundation
Product Apache Directory LDAP API
Versions Default: unaffected
  • affected from 2.1.0 to 2.1.9 (excl.)

Credits

  • Claude Security tool
  • The Apache Software Foundation finder

References

Problem Types

  • CWE-345 (Insufficient Verification of Data Authenticity) CWE