CVE-2026-31934 PUBLISHED

Suricata smtp/mine: quadratic complexity in extracting urls

Assigner: GitHub_M
Reserved: 10.03.2026 Published: 02.04.2026 Updated: 02.04.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	OISF
Product	suricata
Versions	Version >= 8.0.0, < 8.0.4 is affected

References

https://github.com/OISF/suricata/security/advisories/GHSA-hr89-h2pp-f3c8
https://redmine.openinfosecfoundation.org/issues/8292

Problem Types

CWE-407: Inefficient Algorithmic Complexity CWE