CVE-2026-63452 PUBLISHED

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

Assigner: GitHub_M
Reserved: 16.07.2026 Published: 18.09.2026 Updated: 18.09.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Product Status

Vendor OISF
Product suricata
Versions
  • Version >= 8.0.0, < 8.0.6 is affected

References

Problem Types

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