CVE-2026-103552 Apache Directory LDAP API - Denial of Service

Apache Directory LDAP API >= 1.2.0 < 1.2.9 contains a stack overflow caused by processing deeply nested search filters in the server's decoder, letting remote attackers cause denial of service, exploit requires sending crafted nested filters.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
2 October 2026
Updated
15 October 2026
Weakness
CWE-121

Vendor fix

Upgrade to version 1.2.9.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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