Vulnerability · Published Apr 2, 2026 · Assigned by GitHub_M
CVE-2026-31933Suricata stream: quadratic complexity in stream inspection
High 7.5
In plain English
A high-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 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 69.5% 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. Prior to versions 7.0.15 and 8.0.4, specially crafted traffic can cause Suricata to slow down, affecting performance in IDS mode. This issue has been patched in versions 7.0.15 and 8.0.4.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | suricata | 8.0.6-r0 | ALPINE-CVE-2026-31933 |
| Debian:13 | suricata | 1:7.0.10-1+deb13u4 | DEBIAN-CVE-2026-31933 |
| Debian:14 | suricata | 1:8.0.4-1 | DEBIAN-CVE-2026-31933 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-31933 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-31933 |
| Ubuntu:25.10 | suricata | no fix listed | UBUNTU-CVE-2026-31933 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-31933 |
| Ubuntu:26.10 | suricata | no fix listed | UBUNTU-CVE-2026-31933 |
Affected products (as reported)
Weakness: CWE-407 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/OISF/suricata/security/advisories/GHSA-hvp5-gpr6-j4gp x_refsource_CONFIRM
- https://redmine.openinfosecfoundation.org/issues/8272 x_refsource_MISC