CVE-2026-31934

Name: CVE-2026-31934
Creator: NVD / NIST
Published: 2026-04-02T15:16:37.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2026-31934 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.27%

18.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-407

Affected Software

Vendor	Product	Versions
Oisf	Suricata	>= 8.0.0, < 8.0.4

References

https://github.com/OISF/suricata/security/advisories/GHSA-hr89-h2pp-f3c8Vendor Advisory
https://redmine.openinfosecfoundation.org/issues/8292Issue Tracking, Permissions Required

Timeline

Published: Apr 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-31934?

How severe is CVE-2026-31934?

CVE-2026-31934 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-31934?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-31934?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST