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.

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.

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

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. 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

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