# CVE-2026-63452: Suricata HTTP/1 compression bomb denial of service

Source: https://junglewise.ai/threats/cve-2026-63452-suricata-is-a-network-intrusion-detection-system-intrusion  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-63452 · Severity: high · CVSS 7.5 · Published 2026-09-18

Suricata is a network security monitoring engine that analyzes traffic to detect and prevent intrusions. Attackers can send repeated small brotli-compressed responses through a single network connection to exhaust decompression resources, causing the monitoring system to slow down or stop analyzing packets, resulting in loss of security visibility or service outage.

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

## Quick answers

**Is CVE-2026-63452 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-63452 being exploited in the wild.

**How severe is CVE-2026-63452?** High severity, with a CVSS score of 7.5, published 18 September 2026.

**Which products and versions are affected?** OISF Suricata 8.0.0 to 8.0.5.

**Is there a fix for CVE-2026-63452?** A patch was published on 2026-07-07: fix committed to repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-63452 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-63452?** 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

The HTTP/1 parser in Suricata 8.0.0–8.0.5 limits decompression work per individual transaction but does not limit the total number of compression bombs a single flow can submit. When response-body-decompress-layer-limit is enabled, attackers can craft multiple small compressed payloads that collectively consume excessive CPU during decompression, degrading packet processing. The vulnerability is fixed in version 8.0.6 by implementing per-flow compression bomb counting.

## Affected products

- OISF Suricata 8.0.0 to 8.0.5

## Timeline

- 2026-09-18: disclosed
- 2026-07-07: patched: fix committed to repository
- 2026-09-18: advisory

## References

- [https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f](https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f)
- [https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88](https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88)

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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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