CVE-2026-22259

Name: CVE-2026-22259
Creator: NVD / NIST
Published: 2026-01-27T17:16:12.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2026-22259 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, specially crafted traffic can cause Suricata to consume large amounts of memory while parsing DNP3 traffic. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, specially crafted traffic can cause Suricata to consume large amounts of memory while parsing DNP3 traffic. This can lead to the process slowing down and running out of memory, potentially leading to it getting killed by the OOM killer. Versions 8.0.3 or 7.0.14 contain a patch. As a workaround, disable the DNP3 parser in the suricata yaml (disabled by default).

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

0.51%

39.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Oisf	Suricata	< 7.0.14
Oisf	Suricata	>= 8.0.0, < 8.0.3

References

https://github.com/OISF/suricata/commit/50cac2e2465ca211eabfa156623e585e9037bb7ePatch
https://github.com/OISF/suricata/commit/63225d5f8ef64cc65164c0bb1800730842d54942Patch
https://github.com/OISF/suricata/security/advisories/GHSA-878h-2x6v-84q9Patch, Vendor Advisory
https://redmine.openinfosecfoundation.org/issues/8181Issue Tracking, Permissions Required

Timeline

Published: Jan 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-22259?

How severe is CVE-2026-22259?

CVE-2026-22259 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2026-22259?

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-2026-22259?

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

Scan your code now

Source: NVD / NIST