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Vulnerabilities

Vulnerability · CVE-2026-70181

Microsoft Security Advisory CVE-2026-70181 - ASP.NET Core Denial of Service Vulnerability

Published Oct 13, 2026 · Microsoft Security Advisory -

Check if you run it

No confirmed exploitation is on record for CVE-2026-70181. EPSS is 1.06%. Act only if a listed version of Microsoft Security Advisory - is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Microsoft Security Advisory -).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.06%
Remediation
Not established
Affected products
nuget microsoft.aspnetcore.app.runtime.linux-arm · nuget microsoft.aspnetcore.app.runtime.linux-arm64 · nuget microsoft.aspnetcore.app.runtime.linux-musl-arm · nuget microsoft.aspnetcore.app.runtime.linux-musl-arm64 · nuget microsoft.aspnetcore.app.runtime.linux-musl-x64 · nuget microsoft.aspnetcore.app.runtime.linux-x64

Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.WebUtilities. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. FileBufferingReadStream eagerly rents buffers during multipart processing, allowing memory exhaustion and denial of service.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • 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

How to fix CVE-2026-70181

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-70181. EPSS is 1.06%. Act only if a listed version of Microsoft Security Advisory - is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.06%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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.WebUtilities. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. FileBufferingReadStream eagerly rents buffers during multipart processing, allowing memory exhaustion and denial of service.

Sources

  • CVE.orgVulnerability recordCVE-2026-70181

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-70181

    30-day exploitation probability 1.1%

    first.org
  • GitLab Advisory DatabasePackage advisoryCVE-2026-70181

    Microsoft is releasing this security advisory to provide information about a vulnerability in Microsoft.AspNetCore.WebUtilities. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. FileBufferingReadStream eagerly rents buffers during multipart processing, allowing memory exhaustion and denial of service.

    advisories.gitlab.com

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.