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OpenAdvisories
High · 7.5 CVE-2026-63452 EUVD-2026-83390

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

Published Sep 18, 2026 · Updated Sep 21, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
OISF suricata >= 8.0.0, < 8.0.6 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 suricata 1:8.0.6-1 —
Debian 13 suricata No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.04 LTS suricata No fix yet —
Ubuntu 24.04 LTS suricata No fix yet —
Ubuntu 22.04 LTS suricata No fix yet —
Ubuntu 18.04 LTS suricata No fix yet —
Ubuntu 16.04 LTS suricata No fix yet —

References