CVE-2026-103552
Received Received - Intake

Stack Overflow in Apache Directory LDAP API

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: Apache Software Foundation

Description
Stack Overflow vulnerability in Apache Directory LDAP API. Before binding, a client can send a deeply nested search filter that overflows the stack in the server's decoder. This issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9. Users are recommended to upgrade to version 1.2.9, which fixes the issue.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-103552
EUVD
EUVD-2026-91382

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
apache directory_ldap_api to 1.2.9 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This is a stack overflow vulnerability in the Apache Directory LDAP API. It occurs when a client sends a deeply nested search filter to the server before binding. The server's decoder cannot handle the excessive nesting depth, causing a stack overflow.

Detection Guidance

This vulnerability can be detected by checking the version of Apache Directory LDAP API in use. If the version is between 1.2.0 and 1.2.8, the system is vulnerable. Use commands like 'find / -name "*.jar" | grep ldap-api' to locate the library and check its version.

Impact Analysis

An attacker could exploit this to crash the LDAP server, leading to denial of service. If the server is part of a critical infrastructure, this could disrupt authentication or directory services.

Mitigation Strategies

Upgrade Apache Directory LDAP API to version 1.2.9 or later. This can be done by downloading the latest version from the official Apache Directory website and replacing the existing library files.

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