Vulnerability · Published Apr 2, 2026 · Assigned by GitHub_M
CVE-2026-31934Suricata smtp/mine: quadratic complexity in extracting urls
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 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 79.8% 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. From version 8.0.0 to before version 8.0.4, there is a quadratic complexity issue when searching for URLs in mime encoded messages over SMTP leading to a performance impact. This issue has been patched in version 8.0.4.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | suricata | 8.0.6-r0 | ALPINE-CVE-2026-31934 |
| Debian:14 | suricata | 1:8.0.4-1 | DEBIAN-CVE-2026-31934 |
| Ubuntu:22.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-31934 |
| Ubuntu:24.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-31934 |
| Ubuntu:25.10 | suricata | no fix listed | UBUNTU-CVE-2026-31934 |
| Ubuntu:26.04:LTS | suricata | no fix listed | UBUNTU-CVE-2026-31934 |
| Ubuntu:26.10 | suricata | no fix listed | UBUNTU-CVE-2026-31934 |
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-hr89-h2pp-f3c8 x_refsource_CONFIRM
- https://redmine.openinfosecfoundation.org/issues/8292 x_refsource_MISC