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.
Affected products
oisf: suricata
References5
- github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9 MitigationVendor Advisory
- github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b… Patch
- github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb… Patch
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 Release Notes
- redmine.openinfosecfoundation.org/issues/8592 Permissions Required
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 50 · as of 8 November 2026
- CWE
- CWE-407
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