High 7.5Published Sep 10, 2026

CVE-2026-45768Suricata ldap: unbounded responses per transaction can lead to resource exhaustion

Updated under an hour ago (2026-10-19 10:10 UTC)

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It affects OISF suricata. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, LDAP transaction state could store an unbounded number of responses. Because LDAP can be processed over UDP, crafted traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Version 8.0.5 contains a fix. As a workaround, disable LDAP application-layer parsing where it is not required. Alternatively, use a rule like `alert ldap any any -> any any (sid: 1; ldap.responses.count: >1024; bypass;)`.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Sep 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OISF suricata oisf:suricata (from the name)	from 8.0.0, < 8.0.5	CNA record
oisf suricata oisf:suricata	from 8.0.0 before 8.0.5	NVD

References

https://github.com/OISF/suricata/security/advisories/GHSA-cr4x-w4c4-57p7x-refsource-confirm, third-party-advisory
https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315x-refsource-misc, release-notes, vendor-advisory
https://redmine.openinfosecfoundation.org/issues/8405x-refsource-misc, permissions-required

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.