Vulnerability · Published Sep 10, 2026 · Assigned by GitHub_M
CVE-2026-45759Suricata http1: quadratic Content-Disposition processing can lead to denial of service
High 7.5
In plain English
A high-severity uncontrolled resource consumption in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata could repeatedly perform expensive parsing of large HTTP `Content-Disposition` headers during HTTP response body processing. Crafted HTTP traffic could cause excessive CPU usage and denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, use a rule like `alert http1 any any -> any any (sid: 1; http.request_header; content: "Content-Disposition:"; startswith; bsize: > 8192; bypass;)`.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | suricata | no fix listed | DEBIAN-CVE-2026-45759 |
| Debian:14 | suricata | 1:8.0.5-1 | DEBIAN-CVE-2026-45759 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45759 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45759 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-45759 |
Affected products (as reported)
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/OISF/suricata/security/advisories/GHSA-cfq5-g2v5-6652 x_refsource_CONFIRM
- https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8529 x_refsource_MISC