What is the CVSS score of CVE-2026-22259?

CVE-2026-22259 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2026-22259?

Within 24 hours: Identify all Suricata deployments and document current versions. Within 7 days: Prioritize patching to versions 8.0.3, 7.0.14, or later; test patches in non-production environments first. Within 30 days: Complete patching of all production Suricata instances and validate DNP3 traffic monitoring functionality post-deployment.

Suricata CVE-2026-22259

HIGH

Uncontrolled Resource Consumption (CWE-400)

2026-01-27 security-advisories@github.com

Denial Of Service Suricata Suse Oisf

7.5

CVSS 3.1 · GitHub Advisory

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Craft malicious DNP3 traffic
Exploit

Send over network to Suricata
Execution

Parser consumes excessive memory
Impact

Process killed by OOM killer

Vulnerability Assessment

Weakness	CWE CWE-400 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V2 - Validation and Business Logic Resource consumption limits MITRE ATT&CK 1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	DNP3 parser must be enabled in Suricata configuration (enabled by default in versions prior to 8.0.3 and 7.0.14). Network access to Suricata instance required.
Impact	CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitable via remote/network.
Exploit ScenarioDerived	A remote attacker could exploit this vulnerability to the process slowing down and running out of memory, potentially leading to it ge.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Suricata versions prior to 8.0.3 and 7.0.14 are vulnerable to a denial of service condition where specially crafted DNP3 traffic triggers excessive memory consumption, potentially exhausting system memory and causing the service to crash. An unauthenticated attacker on the network can exploit this by sending malicious DNP3 packets to cause the IDS/IPS engine to become unavailable. A patch is available in the latest versions, and users can mitigate the risk by disabling the DNP3 parser if not required.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 7.5

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-400 (Uncontrolled Resource Consumption). Affects Suricata. 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).

Know when Suricata gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

GitHub Advisory PRIMARY 7.5 HIGH

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

SUSE HIGH

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Jan 30, 2026 - 20:01 nvd

Patch available

CVE Published

Jan 27, 2026 - 17:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

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).

Executive ViewAI

Why It Matters

Suricata versions prior to 8.0.3 and 7.0.14 are vulnerable to a denial-of-service attack via maliciously crafted DNP3 network traffic, which can cause memory exhaustion and service disruption. Organizations running affected Suricata instances face potential network monitoring outages that could blind security operations and impact incident detection capabilities.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is delayed, implement network segmentation to restrict DNP3 traffic sources to trusted industrial control system networks only, and configure memory usage alerts/thresholds on Suricata processes to detect exploitation attempts.

Threat Intelligence Overview

EPSS Score

0.1%

Top 79% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS Vendor

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*

More in Suricata

View all

CVE-2025-12490 HIGH Act Now

8.8 Nov 06

Netgate pfSense CE Suricata Path Traversal Remote Code Execution Vulnerability. Rated high severity (CVSS 8.8), this vul

CVE-2018-1000167 HIGH This Week POC

7.8 Apr 18

OISF suricata-update version 1.0.0a1 contains an Insecure Deserialization vulnerability in the insecure yaml.load-Functi

CVE-2025-59150 HIGH This Week POC

7.5 Oct 01

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suric

CVE-2021-45098 HIGH This Week POC

7.5 Dec 16

An issue was discovered in Suricata before 6.0.4. Rated high severity (CVSS 7.5), this vulnerability is remotely exploit

CVE-2019-10056 HIGH This Week POC

7.5 Aug 28