CVE-2026-96238
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.NET Origin Validation Bypass Vulnerability

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Microsoft Corporation

Description
Origin validation error in .NET allows an unauthorized attacker to bypass a security feature over a network.

CVSS Scores

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-19
AI Q&A
2026-10-14
EPSS Evaluated
2026-10-18
NVD
CVE-2026-96238
EUVD
EUVD-2026-100210

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
Microsoft .NET 10.0 10.0.0
Microsoft .NET 11.0 11.0.0
Microsoft .NET 8.0 8.0.0
Microsoft .NET 9.0 9.0.0
Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.0
Microsoft Microsoft Visual Studio 2026 version 18.10 18.10.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-346 The product does not properly verify that the source of data or communication is valid.

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Executive Summary

This vulnerability is an origin validation error in .NET that allows an unauthorized attacker to bypass a security feature over a network. It affects multiple versions of .NET and Visual Studio.

Impact Analysis

An attacker could exploit this to bypass security protections, potentially gaining unauthorized access to sensitive operations or data. The impact is rated as Important with a CVSS score of 6.5.

Compliance Impact

This vulnerability allows unauthorized attackers to bypass security features over a network, which could lead to unauthorized access to sensitive data. This may impact compliance with GDPR (data protection) and HIPAA (healthcare data privacy) by enabling unauthorized data exposure or modification.

Mitigation Strategies

Apply the latest security updates from Microsoft for .NET 8.0, 9.0, 10.0, 11.0, and Visual Studio 2022/2026 to patch the origin validation error.

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