CVE-2026-47303

39

FAUCET Score

Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

First published: Jul 14, 2026Last modified: Jul 22, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 8.0.0, < 8.0.29CPE matchmatch criteria	cpe:2.3:a:microsoft:.net::::::::
		>= 9.0.0, < 9.0.18CPE matchmatch criteria	cpe:2.3:a:microsoft:.net::::::::
		>= 10.0.0, < 10.0.6CPE matchmatch criteria	cpe:2.3:a:microsoft:.net::::::::
		>= 17.12.0, < 17.12.22CPE matchmatch criteria	cpe:2.3:a:microsoft:visual_studio_2022::::::::
		>= 17.14.0, < 17.14.36CPE matchmatch criteria	cpe:2.3:a:microsoft:visual_studio_2022::::::::

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

2.8

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.74%

Probability of exploitation in next 30 days

EPSS Percentile

50.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0074 is in the 43rd percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (21)

microsoftpatch availablevia msrc

Product: .NET 10.0 installed on LinuxFixed in: 10.0.6

microsoftpatch availablevia msrc

Product: .NET 10.0 installed on Mac OSFixed in: 10.0.6

microsoftpatch availablevia nvd_reference

microsoftpatch availablevia msrc

Product: .NET 10.0 installed on Mac OSFixed in: 10.0.10

microsoftpatch availablevia msrc

Product: .NET 8.0 installed on Mac OSFixed in: 8.0.29

microsoftpatch availablevia msrc

Product: .NET 9.0 installed on LinuxFixed in: 9.0.18

microsoftpatch availablevia msrc

Product: .NET 9.0 installed on Mac OSFixed in: 9.0.18

microsoftpatch availablevia msrc

Product: .NET 9.0 installed on WindowsFixed in: 9.0.18

microsoftpatch availablevia msrc

Product: Microsoft Visual Studio 2022 version 17.12Fixed in: 17.12.22

microsoftpatch availablevia msrc

Product: Microsoft Visual Studio 2022 version 17.14Fixed in: 17.14.36

microsoftpatch availablevia msrc

Product: Microsoft Visual Studio 2026 version 18.7Fixed in: 18.7.4

microsoftpatch availablevia msrc

Product: .NET 10.0 installed on LinuxFixed in: 10.0.10

microsoftpatch availablevia msrc

Product: .NET 8.0 installed on WindowsFixed in: 8.0.29

microsoftpatch availablevia msrc

Product: .NET 8.0 installed on LinuxFixed in: 8.0.29

nugetpatch availablevia ghsa

Product: Microsoft.AspNetCore.Authentication.NegotiateFixed in: 10.0.10

nugetpatch availablevia ghsa

Product: Microsoft.AspNetCore.Authentication.NegotiateFixed in: 9.0.18

nugetpatch availablevia ghsa

Product: Microsoft.AspNetCore.Authentication.NegotiateFixed in: 8.0.29

ubuntupatch availablevia ubuntu_usn

Product: dotnet8 (noble)Fixed in: 8.0.129-8.0.29-0ubuntu1~24.04.1

ubuntupatch availablevia ubuntu_usn

Product: dotnet10 (resolute)Fixed in: 10.0.110-10.0.10-0ubuntu1~26.04.1

ubuntupatch availablevia ubuntu_usn

Product: dotnet8 (jammy)Fixed in: 8.0.129-8.0.29-0ubuntu1~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: dotnet10 (noble)Fixed in: 10.0.110-10.0.10-0ubuntu1~24.04.1

Vendor Advisories (3)

nugetGHSA-2p3q-h3hg-jcqqhigh

Microsoft Security Advisory CVE-2026-47303 – .NET Elevation of Privilege Vulnerability

ubuntuUSN-8553-1

.NET vulnerabilities

microsoft2026-Jul/CVE-2026-47303Important

ASP.NET Core Elevation of Privilege Vulnerability

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2026-47303

PatchVendor Advisory