Description
Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Affected products
microsoft: .net; apple: macos; linux: linux kernel; microsoft: windows; microsoft: visual studio 2022; microsoft: visual studio 2026
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47303 PatchVendor Advisory
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 58 · as of 15 November 2026
- CWE
- CWE-90CWE-302CWE-863
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.