7.5
High
CVE-2026-63447 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| suricata 8.0 | 8.0.5 → < 8.0.6 | 8.0.6 |
Other CVEs of suricata
The 86 CVEs of suricata →
CVE-2026-94084
Suricata before 8.0.7 has an Http2ThreadMultiBuf use-after-free when a transaction is inspected by rules that use…
9.4
Critical
CVE-2026-94083
Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state…
9.4
Critical
CVE-2026-71855
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine
5.9
Medium
CVE-2026-71418
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine
7.5
High