Microsoft Security Advisory CVE-2026-96222 - .NET Spoofing Vulnerability

Date Oct 13, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product NuGet ยท System.Security.Cryptography.Xml
CVE CVE-2026-96222
High-risk advisory CVE-2026-96222

Summary

Microsoft Security Advisory CVE-2026-96222 - .NET Spoofing Vulnerability

Why it matters

GitHub has published a reviewed security advisory for System.Security.Cryptography.Xml. Prioritize it with other application dependency updates.

Operator check

Check whether System.Security.Cryptography.Xml is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.