# CVE-2026-45759: Suricata HTTP Content-Disposition denial of service

Source: https://junglewise.ai/threats/cve-2026-45759-suricata-http-content-disposition-denial-of-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-10. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-45759 · Severity: high · CVSS 7.5 · Published 2026-09-10

Suricata is a network security monitoring engine used to detect and prevent intrusions. A vulnerability in HTTP header parsing allows attackers to send crafted network traffic that causes excessive CPU consumption, potentially disabling the monitoring system and leaving networks unprotected.

Technologies: [OISF Suricata](https://junglewise.ai/threats/technologies/suricata). Vendors: [OISF](https://junglewise.ai/threats/vendors/oisf).

## Quick answers

**Is CVE-2026-45759 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-45759 being exploited in the wild.

**How severe is CVE-2026-45759?** High severity, with a CVSS score of 7.5, published 10 September 2026.

**Which products and versions are affected?** OISF Suricata before 7.0.16 and before 8.0.5.

**Is there a fix for CVE-2026-45759?** A patch was published on 2026-05-19: Suricata 7.0.16 and 8.0.5 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-45759 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-45759?** Check whether you run OISF Suricata at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A quadratic parsing vulnerability exists in Suricata's HTTP/1 Content-Disposition header processing. The HTTP response body parser repeatedly performs expensive parsing operations on large Content-Disposition headers without proper optimization. An unauthenticated attacker on the network can craft HTTP traffic with oversized Content-Disposition headers to trigger excessive CPU usage and denial of service. The vulnerability requires no authentication or user interaction and is remotely exploitable via network traffic. Patches are available in Suricata versions 7.0.16 and 8.0.5; a workaround using detection rules is provided for unpatched systems.

## Affected products

- OISF Suricata before 7.0.16 and before 8.0.5

## Timeline

- 2026-06-02: disclosed
- 2026-05-19: patched: Suricata 7.0.16 and 8.0.5 released

## References

- [https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315](https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315)
- [https://github.com/OISF/suricata/security/advisories/GHSA-cfq5-g2v5-6652](https://github.com/OISF/suricata/security/advisories/GHSA-cfq5-g2v5-6652)

## Related threats

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- [Suricata DoH2 type confusion in HTTP state cleanup](https://junglewise.ai/threats/cve-2026-94083-suricata-before-8-0-7-has-a-doh2-type-confusion-that-can-cause-an)
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