---
id: CVE-2026-70162
title: >-
  A denial of service vulnerability exists when Microsoft Common Object Runtime
  Library improperly handles web requests
summary: >-
  A denial of service vulnerability exists when Microsoft Common Object Runtime
  Library improperly handles web requests. An attacker who successfully
  exploited this vulnerability could cause a denial of service against a .NET
  web applicati…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-405
  - CWE-770
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T23:17:57.420'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70162'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70162'
    label: secure@microsoft.com
  - url: 'https://github.com/dotnet/runtime/security/advisories/GHSA-2fmv-rv2c-59x7'
  - url: 'https://github.com/dotnet/announcements/issues/454'
  - url: 'https://github.com/dotnet/runtime/issues/135699'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70162'
  - url: 'https://github.com/advisories/GHSA-2fmv-rv2c-59x7'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-70162.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-70162'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2551706'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-70162'
  - url: 'https://access.redhat.com/errata/RHSA-2026:84693'
tags:
  - nvd
  - cve.org
  - ghsa
  - nuget
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-10-13T19:43:29.016Z'
vendor: Microsoft
product: Microsoft Visual Studio 2022 version 17.14
affected:
  - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.42
  - visual_studio_2026_version_18.10 >= 18.10.0 < 18.10.4
  - System.Security.Cryptography.Pkcs >= 10.0.0 < 10.0.13
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-13T22:08:21.799490Z'
epss: 0.00895
epssPercentile: 0.59318
aliases:
  - GHSA-2fmv-rv2c-59x7
ecosystem: nuget
patched:
  - System.Security.Cryptography.Pkcs 10.0.13
  - System.Security.Cryptography.Pkcs 11.0.0-rc.2
  - System.Security.Cryptography.Pkcs 8.0.2
  - System.Security.Cryptography.Pkcs 9.0.21
---

## Overview

A denial of service vulnerability exists when Microsoft Common Object Runtime Library improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET web application.
A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the .NET application.
The update addresses the vulnerability by correcting how the .NET web application handles web requests.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-70162)

Affected packages:

- `System.Security.Cryptography.Pkcs >= 10.0.0, <= 10.0.12`
- `System.Security.Cryptography.Pkcs >= 11.0.0-preview.1, <= 11.0.0-rc.1`
- `System.Security.Cryptography.Pkcs >= 8.0.0, <= 8.0.1`
- `System.Security.Cryptography.Pkcs >= 9.0.0, <= 9.0.20`

Patched in:

- `System.Security.Cryptography.Pkcs 10.0.13`
- `System.Security.Cryptography.Pkcs 11.0.0-rc.2`
- `System.Security.Cryptography.Pkcs 8.0.2`
- `System.Security.Cryptography.Pkcs 9.0.21`

Source: https://github.com/advisories/GHSA-2fmv-rv2c-59x7

## Vendor advisories

- **RHSA-2026:84693** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:84693)