---
id: CVE-2026-47304
title: .NET Security Feature Bypass Vulnerability
summary: >-
  Improper verification of cryptographic signature in .NET allows an
  unauthorized attacker to bypass a security feature over a network.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-347
  - CWE-345
vendor: Microsoft
product: .NET 10.0
affected:
  - .net_10.0 >= 10.0.0 < 10.0.10
  - .net_8.0 >= 8.0.0 < 8.0.29
  - .net_9.0 >= 9.0.0 < 9.0.18
  - .net_framework_3.5 >= 3.5.0 < 2.0.50727.8983 & 3.0.30729.8978
  - >-
    .net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9069 & 3.0.30729.9067 &
    4.7.4143.0
  - >-
    .net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9069 & 3.0.30729.9067 &
    4.8.4803.0
  - >-
    .net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9182 & 3.0.30729.9168 &
    4.8.9339.0
  - .net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4143.0
  - .net_framework_4.8 >= 4.8.0 < 4.8.4803.0
  - .net_framework_4.8.1 >= 4.8.0.0 < 4.8.9340.0
  - visual_studio_2017_version_15.9_includes_15.0_-_15.8 -
  - visual_studio_2019_version_16.11_includes_16.0_-_16.10 -
  - visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.22
  - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.36
  - visual_studio_2026_version_18.5 -
  - visual_studio_2026_version_18.7 >= 18.0 < 18.7.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-15T03:57:19.256900Z'
published: '2026-07-14'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T18:21:06.312Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-47304'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304'
    label: .NET Security Feature Bypass Vulnerability
  - url: 'https://github.com/dotnet/runtime/security/advisories/GHSA-g8r8-53c2-pm3f'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47304'
  - url: 'https://github.com/dotnet/announcements/issues/412'
  - url: 'https://github.com/dotnet/runtime/issues/130709'
  - url: 'https://github.com/advisories/GHSA-g8r8-53c2-pm3f'
tags:
  - cve.org
  - ghsa
  - nuget
epss: 0.00286
epssPercentile: 0.18733
aliases:
  - GHSA-g8r8-53c2-pm3f
ecosystem: nuget
patched:
  - System.Security.Cryptography.Xml 10.0.10
  - System.Security.Cryptography.Xml 9.0.18
  - System.Security.Cryptography.Xml 8.0.29
ingestedAt: '2026-07-20T23:44:02.849Z'
---

## Overview

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.

## Affected

- `.net_10.0 >= 10.0.0 < 10.0.10`
- `.net_8.0 >= 8.0.0 < 8.0.29`
- `.net_9.0 >= 9.0.0 < 9.0.18`
- `.net_framework_3.5 >= 3.5.0 < 2.0.50727.8983 & 3.0.30729.8978`
- `.net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0`
- `.net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0`
- `.net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0`
- `.net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4143.0`
- `.net_framework_4.8 >= 4.8.0 < 4.8.4803.0`
- `.net_framework_4.8.1 >= 4.8.0.0 < 4.8.9340.0`
- `visual_studio_2017_version_15.9_includes_15.0_-_15.8 -`
- `visual_studio_2019_version_16.11_includes_16.0_-_16.10 -`
- `visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.22`
- `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.36`
- `visual_studio_2026_version_18.5 -`
- `visual_studio_2026_version_18.7 >= 18.0 < 18.7.4`

## Remediation

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

## Package advisory (CVE-2026-47304)

Affected packages:

- `System.Security.Cryptography.Xml >= 10.0.0, <= 10.0.9`
- `System.Security.Cryptography.Xml >= 9.0.0, <= 9.0.17`
- `System.Security.Cryptography.Xml >= 8.0.0, <= 8.0.28`

Patched in:

- `System.Security.Cryptography.Xml 10.0.10`
- `System.Security.Cryptography.Xml 9.0.18`
- `System.Security.Cryptography.Xml 8.0.29`

Source: https://github.com/advisories/GHSA-g8r8-53c2-pm3f