Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API. (CVE-2026-103878)
A vulnerability in Apache Directory LDAP API versions from 2.1.0 up to but not including 2.1.9 allows cleartext transmission of sensitive information. This occurs because a StartTLS operation initiated after a Search request can cause data to be sent in plain text before the TLS handshake completes. The issue is fixed in version 2.1.9.
AI Analysis
Technical Summary
The Apache Directory LDAP API contains a vulnerability (CVE-2026-103878) where initiating a StartTLS extended operation after a Search request results in sensitive data being transmitted in cleartext prior to the completion of the TLS handshake. This affects versions from 2.1.0 before 2.1.9. The flaw is addressed by upgrading to version 2.1.9.
Potential Impact
Sensitive information may be exposed in plaintext over the network during LDAP operations if the StartTLS extended operation is started after a Search request, potentially allowing interception of data before encryption is established.
Mitigation Recommendations
Upgrade Apache Directory LDAP API to version 2.1.9 or later, which fixes this vulnerability by ensuring the TLS handshake completes before sensitive data is transmitted.
Cleartext transmission of sensitive information vulnerability in Apache Directory LDAP API. (CVE-2026-103878)
Description
A vulnerability in Apache Directory LDAP API versions from 2.1.0 up to but not including 2.1.9 allows cleartext transmission of sensitive information. This occurs because a StartTLS operation initiated after a Search request can cause data to be sent in plain text before the TLS handshake completes. The issue is fixed in version 2.1.9.
Affected software
pkg:maven/org.apache.directory.api/api-ldap-clientRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Apache Directory LDAP API contains a vulnerability (CVE-2026-103878) where initiating a StartTLS extended operation after a Search request results in sensitive data being transmitted in cleartext prior to the completion of the TLS handshake. This affects versions from 2.1.0 before 2.1.9. The flaw is addressed by upgrading to version 2.1.9.
Potential Impact
Sensitive information may be exposed in plaintext over the network during LDAP operations if the StartTLS extended operation is started after a Search request, potentially allowing interception of data before encryption is established.
Mitigation Recommendations
Upgrade Apache Directory LDAP API to version 2.1.9 or later, which fixes this vulnerability by ensuring the TLS handshake completes before sensitive data is transmitted.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-vmxq-hqjm-cxv7
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-103878"]
- State
- PUBLISHED
Threat ID: 6abfee9ca43b0b3b89e551a6
Added to database: 10/02/2026, 17:49:16 UTC
Last enriched: 10/02/2026, 18:03:32 UTC
Last updated: 10/03/2026, 02:45:57 UTC
Views: 3
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