How severe is CVE-2022-29864?

CVE-2022-29864 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2022-29864?

CVE-2022-29864 affects the following packages: OPCFoundation.NetStandard.Opc.Ua.Core (NuGet). Ecosystems affected: NuGet.

How do I fix CVE-2022-29864?

Update OPCFoundation.NetStandard.Opc.Ua.Core to 1.4.368.58 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29864 is resolved across your whole dependency graph.

How do I detect CVE-2022-29864 in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for OPCFoundation.NetStandard.Opc.Ua.Core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2022-29864 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2022-29864 actively exploited in the wild?

No public exploit code has been indexed for CVE-2022-29864 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2022-29864?

CVE-2022-29864 has an EPSS (Exploit Prediction Scoring System) score of 2.0%, placing it in the 81th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2022-29864?

CVE-2022-29864 is classified as Uncontrolled Resource Consumption (CWE-400). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2022-29864 published, and has it been updated?

CVE-2022-29864 was published on June 16, 2022 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET

.NET NuGet

Not in CISA KEV

HIGH severity

CVE-2022-29864 — OPCFoundation.NetStandard…

HIGH

CVE-2022-29864 is a high-severity (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in OPCFoundation.NetStandard.Opc.Ua.Core. A fix is available for OPCFoundation.NetStandard.Opc.Ua.Core — see the affected versions and patch details below.

Uncontrolled Resource Consumption in OPCFoundation.NetStandard.Opc.Ua.Core

Also known asGHSA-vhfw-v69p-crcw

Published

Jun 16, 2022

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

2.0%probability of exploitation in next 30 days

Lower Risk+0.03%

Lower risk than most CVEs81th percentile — riskier than 81% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

.NETOPCFoundation.NetStandard.Opc.Ua.Core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability was discovered in the OPC UA .NET Standard Stack that allows a malicious client to cause a server to trigger an out of memory exception by sending a large number of message chunks.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`OPCFoundation.NetStandard.Opc.Ua.Core`	all versions	1.4.368.58`dotnet add package OPCFoundation.NetStandard.Opc.Ua.Core --version 1.4.368.58`

Affected Products

1 product · 1 configurations

Application

ua .net standard stackopcfoundation

< 1.4.368.58

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for OPCFoundation.NetStandard.Opc.Ua.Core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update OPCFoundation.NetStandard.Opc.Ua.Core to 1.4.368.58 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-29864 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

A vulnerability was discovered in the OPC UA .NET Standard Stack that allows a malicious client to cause a server to trigger an out of memory exception by sending a large number of message chunks.

O3 Security · Impact-Aware SCA

Is CVE-2022-29864 in your dependencies?

Find it across NuGet, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

7.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Raw vector

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

CWE Classification

CWE-400Uncontrolled Resource Consumption

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Jun 16, 2022

Last updated

Oct 28, 2026

Identifiers

CVE-2022-29864

GHSA-vhfw-v69p-crcw

References

Advisorygithub.com · CVE 2022 29864.json Advisorynvd.nist.gov · CVE 2022 29864 Webfiles.opcfoundation.org · OPC Foundation Security Bulletin CVE 2022 29864.pdf Webopcfoundation.org · security Webgithub.com · GHSA vhfw v69p crcw Packagegithub.com · UA .NETStandard

Related vulnerabilities

This CVE is high severity; 5 of 8 other CVEs affecting OPCFoundation.NetStandard.Opc.Ua.Core are rated as high or higher (top: high).

CVE-2024-42512CVE-2024-45526GHSA-qm9f-c3v9-wphvCVE-2024-33862CVE-2023-31048CVE-2022-29862CVE-2022-29866CVE-2022-29865

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 28, 2026

CVE-2022-29864 — OPCFoundation.NetStandard…

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2022-29864 in your dependencies?