CVE-2026-96233: Microsoft Security Advisory CVE-2026-96233 - .NET and Visual Studio Denial of Service Vulnerability

October 13, 2026 (updated October 19, 2026)

Microsoft is releasing this security advisory to provide information about a vulnerability in System.Runtime. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

DateTime Hebrew-number parsing can read outside expected stack bounds and terminate the process.

References

github.com/advisories/GHSA-87vj-4hqv-22p9
github.com/dotnet/announcements/issues/481
github.com/dotnet/runtime/issues/135708
github.com/dotnet/runtime/security/advisories/GHSA-87vj-4hqv-22p9
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96233
nvd.nist.gov/vuln/detail/CVE-2026-96233

Code Behaviors & Features

Detect and mitigate CVE-2026-96233 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →