Vulnerability · Published Jan 27, 2026 · Assigned by GitHub_M
CVE-2026-22263Suricata http1: quadratic complexity in headers parsing over multiple packets
Medium 5.3
In plain English
A medium-severity security flaw in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 61.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | suricata | 1:8.0.3-1 | DEBIAN-CVE-2026-22263 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-22263 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-22263 |
| Ubuntu:25.10 | suricata | no fix listed | UBUNTU-CVE-2026-22263 |
Affected products (as reported)
Weakness: CWE-1050 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://github.com/OISF/suricata/security/advisories/GHSA-rwc5-hxj6-hwx7 x_refsource_CONFIRM
- https://github.com/OISF/suricata/commit/018a377f74e3eb2b042c6f783ad9043060923428 x_refsource_MISC
- https://redmine.openinfosecfoundation.org/issues/8201 x_refsource_MISC