NVD / CVE Program· CNA GitHub_M

CVE-2026-22259: Suricata dnp3: unbounded transaction growth

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.61% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: suricata (Debian:13) 1:7.0.10-1+deb13u3; suricata (Debian:14) 1:8.0.3-1; suricata (openSUSE:Tumbleweed) 8.0.3-1.1.

Low priority for now. Upgrade to suricata (Debian:13) 1:7.0.10-1+deb13u3; suricata (Debian:14) 1:8.0.3-1; suricata (openSUSE:Tumbleweed) 8.0.3-1.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

Published: Jan 27, 2026
Updated: Jun 17, 2026
EPSS: 0.6% · 49th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.6%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
oisf	suricata	cpe:2.3:a:oisf:suricata

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

oisf suricatabefore 7.0.14
oisf suricata8.0.0 and later · before 8.0.3

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

OISF suricata
- < 7.0.14, >= 8.0.0, < 8.0.3affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:13	suricata	before 1:7.0.10-1+deb13u3	1:7.0.10-1+deb13u3
Debian:14	suricata	before 1:8.0.3-1	1:8.0.3-1
openSUSE:Tumbleweed	suricata	before 8.0.3-1.1	8.0.3-1.1

Same product

oisf: all records

Other highest-scoring records for the same primary product.

CVE-2021-37592Suricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a certain sequence of…
40Plan
CVE-2018-10244Suricata version 4.0.4 incorrectly handles the parsing of an EtherNet/IP PDU.
40Plan
CVE-2026-22262Suricata datasets: stack overflow when saving a set
39Monitor

Published before and after this one in the same product

← EarlierCVE-2025-64344Nov 26, 2025 · Suricata is vulnerable to a stack overflow from unbounded stack allocation in LuaPushStringBuffer
30Monitor
← EarlierCVE-2026-22258Jan 27, 2026 · Suricata DCERPC: unbounded fragment buffering leads to memory exhaustion
30Monitor
Later →CVE-2026-22260Jan 27, 2026 · Suricata http1: infinite recursion in decompression
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:suricata	1:7.0.10-1+deb13u3 · Debian:13	Package registry (OSV)
opensuse:suricata	8.0.3-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-45769226 days apartikev2: unbounded client transform storage can lead to resource exhaustion
31Monitor
CVE-2026-222580 days apartSuricata DCERPC: unbounded fragment buffering leads to memory exhaustion
30Monitor
CVE-2026-3193565 days apartSuricata http2: unbounded resource consumption
30Monitor
CVE-2025-53538189 days apartSuricata's mishandling of data on HTTP2 stream 0 can lead to resource starvation
30Monitor
CVE-2026-45765226 days apartSuricata dnp3: unbounded reassembly can lead to resource exhaustion
30Monitor
CVE-2026-45766226 days apartSuricata nfs: unbounded stateful structures can lead to resource exhaustion
30Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/OISF/suricata/commit/50cac2e2465ca211eabfa156623e585e9037bb7e

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records