Bug 2538241 (CVE-2026-63452)

Summary: CVE-2026-63452 Suricata: Suricata: Denial of Service via repeated Brotli compression bombs
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in Suricata, a network Intrusion Detection System (IDS) and Intrusion Prevention System (IPS). A remote attacker can exploit this vulnerability by sending repeated, small Brotli compressed responses to the HTTP/1 parser. This can cause the system to perform expensive decompression work, leading to excessive CPU consumption. The consequence is degraded packet processing, which may result in a denial of service or loss of network monitoring visibility.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2539204    
Bug Blocks:    

Description OSIDB Bzimport 2026-09-22 17:29:10 UTC 
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.