EUVD Vulnerability Catalog

EUVD-2026-91361

Severity: CRITICAL Base Score: 9.8 CVSS Version: 3.1

Vulnerability 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.

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Privileges Required (PR): None

▪ User Interaction (UI): None

▪ Scope (S): Unchanged

▪ Confidentiality Impact (C): High

▪ Integrity Impact (I): High

▪ Availability Impact (A): High

Affected Vendors & Systems

Vendor Apache Software Foundation

References & Advisory Links

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

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

apache

EPSS Probability

0.39

Known Aliases

GHSA-v496-rffp-c5q7 CVE-2026-103877

Published On

2026-10-02

Last Updated

2026-10-07