Suricata http1: repeated brotli compression bombs can cause excessive CPU consumption

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63452
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 21:17:04 UTC
Updated2026-09-18 21:17:04 UTC
DescriptionSuricata 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.003610000 probability, percentile 0.299250000 (date 2026-09-19)

Problem Types: CWE-400 | CWE-409 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-409 CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OISF Suricata affected >= 8.0.0, < 8.0.6 Not specified

References

ReferenceSourceLinkTags
github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88 [email protected] github.com
github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f [email protected] github.com
github.com/OISF/suricata/releases/tag/suricata-8.0.6 [email protected] github.com
redmine.openinfosecfoundation.org/issues/8694 [email protected] redmine.openinfosecfoundation.org
github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84 [email protected] github.com
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