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Findings

CVE-2026-70175

Microsoft Security Advisory CVE-2026-70175 - ASP.NET Core Elevation of Privilege Vulnerability

Published Oct 13, 2026

Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.Identity and Microsoft.AspNetCore.Identity.UI. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. ASP.NET Core Identity password-reset and confirmation flows can send mail to the unvalidated request address instead of the user's stored canonical address.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · GitLab Advisory Database

    Detected

    Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.Identity and Microsoft.AspNetCore.Identity.UI. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. ASP.NET Core Identity password-reset and confirmation flows can send mail to the unvalidated request address instead

Affected

  • nuget microsoft.aspnetcore.app.runtime.linux-armversion unspecified
  • nuget microsoft.aspnetcore.app.runtime.linux-arm64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.linux-musl-armversion unspecified
  • nuget microsoft.aspnetcore.app.runtime.linux-musl-arm64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.linux-musl-x64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.linux-x64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.osx-arm64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.osx-x64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.win-armversion unspecified
  • nuget microsoft.aspnetcore.app.runtime.win-arm64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.win-x64version unspecified
  • nuget microsoft.aspnetcore.app.runtime.win-x86version unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-70175

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-70175

    30-day exploitation probability 0.6%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-70175

    Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.Identity and Microsoft.AspNetCore.Identity.UI. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. ASP.NET Core Identity password-reset and confirmation flows can send mail to the unvalidated request address instead

    advisories.gitlab.com