Vulnerability in Oisf Suricata
CVE-2026-22263
Suricata is a network IDS, IPS and NSM engine. Starting in version 8.0.0 and prior to version 8.0.3, inefficiency in http1 headers parsing can lead to slowdown over multiple packets. Version 8.0.3 patches the issue. No known workarounds are available.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Oisf Suricata — versions >= 8.0.0, < 8.0.3
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-rwc5-hxj6-hwx7 (Vendor Advisory)
- github.com/OISF/suricata/commit/018a377f74e3eb2b042c6f783ad9043060923428 (Patch)
- redmine.openinfosecfoundation.org/issues/8201 (Permissions Required)
Frequently asked questions
- What is CVE-2026-22263?
- CVE-2026-22263 is a medium-severity vulnerability in Oisf Suricata, classified under CWE-1050. CVSS score: 5.3/10. Published 2026-01-27.
- How severe is CVE-2026-22263?
- Medium severity. CVSS v3 base score is 5.3 out of 10.