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Message-ID: <a993105c-d527-ce32-8405-bd1f1acf1001@apache.org>
Date: Fri, 02 Oct 2026 08:48:04 +0000
From: Emmanuel Lécharny <elecharny@...che.org>
To: oss-security@...ts.openwall.com
Subject: CVE-2026-103877: Apache Directory LDAP API: Unsafe loading of Java
code from LDAP schema elements
Severity: critical
Affected versions:
- Apache Directory LDAP API 2.1.0 before 2.1.9
Description:
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.
Credit:
Claude Security (tool)
The Apache Software Foundation (finder)
References:
https://directory.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-103877
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