Uncontrolled Resource Consumption in OPC UA .NET Standard Reference Server
This security update resolves a vulnerability in the OPC UA .NET Standard Reference Server that allows remote attackers to send malicious requests that consume all memory available to the server.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| .NET (NuGet) | OPCFoundation.NetStandard.Opc.Ua.Server | < 1.4.371.86 | 1.4.371.86 |
References
- https://github.com/OPCFoundation/UA-.NETStandard/security/advisories/GHSA-vpf7-r2fv-75m9
- https://nvd.nist.gov/vuln/detail/CVE-2023-27321
- https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-27321.pdf
- https://github.com/OPCFoundation/UA-.NETStandard
- https://www.zerodayinitiative.com/advisories/ZDI-23-548
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- .NET (NuGet)
- Package
OPCFoundation.NetStandard.Opc.Ua.Server- Disclosed
- 05.05.2023
- Updated
- 11.10.2026 11:23
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vpf7-r2fv-75m9 - CC BY 4.0
Vulnerability history: OPCFoundation.NetStandard.Opc.Ua.Server
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 3
- First → latest
- 08.2022 05.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 2
Disclosures per year
- 2022: 1
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 0
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Uncontrolled Resource Consumption in OPC UA .NET Standard Reference Server this entry
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