CVE-2026-103552

Apache Directory LDAP API: A unbound client can send a deeply nested search filter that overflows the stack in the server's decoder

State: Published
Severity: 7.3 High
Published: Oct 2, 2026
Updated: Oct 2, 2026
Reserved: Sep 30, 2026

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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.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	CISA-ADP

Weaknesses

CWE-121 Stack-based buffer overflow

Affected Products

Product	Versions
Apache Directory LDAP APIApache Software Foundation	1.2.0 to before 1.2.9Affected

References

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