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CVE-2026-63447 Details

Description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.protocols.ftp.max-tx is reached while processing one large chunk of FTP command data. The oversized transaction list is repeatedly processed with quadratic complexity after the too_many_transactions event, allowing crafted FTP traffic to degrade packet processing, reduce monitoring visibility, or cause denial of service. This issue is fixed in version 8.0.6.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385	[email protected]
https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5	[email protected]
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6	[email protected]
https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9	[email protected]
https://redmine.openinfosecfoundation.org/issues/8592	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-407	Inefficient Algorithmic Complexity	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 21, 2026	CVE Modified	CISA-ADP
Sep 18, 2026	New CVE Received	[email protected]