CVE-2026-103877

Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE.  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.

Score
CVSS 3.1 9.8 Critical
Status
Deferred - security@apache.org
Published
2026-10-02
Last modified
2026-10-07
Weaknesses
CWE-502

Affected products

References