CVE-2026-103877 — Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Directory LDAP API	affected 2.1.0 before 2.1.9

CWE

CWE-502

References

https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/10/02/5

CISA-ADP

No English description supplied.

No references supplied.