---
title: "CVE-2026-63447: Suricata - Denial of Service"
description: "Suricata 8.0.5 to 8.0.6 contains a denial of service caused by continued allocation of FTP transactions beyond max-tx limit in the FTP parser, letting attackers degrade packet processing, exploit requires crafted FTP traffic."
url: https://panop.io/threat-heartbeat/CVE-2026-63447/
---

# CVE-2026-63447 Suricata - Denial of Service

Suricata 8.0.5 to 8.0.6 contains a denial of service caused by continued allocation of FTP transactions beyond max-tx limit in the FTP parser, letting attackers degrade packet processing, exploit requires crafted FTP traffic.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.63% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-63447)

## 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:N/I:N/A:H

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-407](https://cwe.mitre.org/data/definitions/407.html)

## Vendor fix

Update to version 8.0.6.

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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-63447](https://nvd.nist.gov/vuln/detail/CVE-2026-63447)
- [https://github.com/OISF/suricata/releases/tag/suricata-8.0.6](https://github.com/OISF/suricata/releases/tag/suricata-8.0.6)
- [https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9](https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9)
- [https://redmine.openinfosecfoundation.org/issues/8592](https://redmine.openinfosecfoundation.org/issues/8592)
- [https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385](https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385)
- [https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5](https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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