CVE-2026-63452
Suricata http1: repeated brotli compression bombs can cause excessive CPU consumption
- State
- Published
- Severity
- 7.5 High
- Published
- Sep 18, 2026
- Updated
- Sep 21, 2026
- Reserved
- Jul 16, 2026
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the HTTP/1 parser limits decompression work per transaction but does not limit how many small brotli compression bombs a single flow can submit. With response-body-decompress-layer-limit enabled, repeated compressed responses make the decompression paths in rust/htp perform expensive work for every transaction, degrading packet processing and potentially causing loss of monitoring visibility or denial of service. This issue is fixed in version 8.0.6.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
suricataOISF |
|
References
- https://github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84
- https://github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f
- https://github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
- https://redmine.openinfosecfoundation.org/issues/8694
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