Resource exhaustion in Oisf Suricata
CVE-2026-63452
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (50.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Oisf Suricata — versions >= 8.0.0, < 8.0.6
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-j9cx-w9xm-5x84 (Mitigation, Vendor Advisory)
- github.com/OISF/suricata/commit/392b6aee2971a4b5e573850f5d832112509bcb5f (Patch)
- github.com/OISF/suricata/commit/e369bf29ee5bbd0cdf6a98dc4a3357ba43c86a88 (Patch)
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 (Release Notes)
- redmine.openinfosecfoundation.org/issues/8694 (Permissions Required)
Frequently asked questions
- What is CVE-2026-63452?
- CVE-2026-63452 is a high-severity vulnerability in Oisf Suricata, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-18.
- How severe is CVE-2026-63452?
- High severity. CVSS v3 base score is 7.5 out of 10.