Cross-site scripting in Visual Studio - CVE-2026-96230
Published: October 14, 2026
Vulnerability identifier: #VU155430
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-96230
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute code in the developer's context.
The vulnerability exists due to improper neutralization of input during web page generation (cross-site scripting) in ASP.NET Core when generating web pages. A remote attacker can host a specially crafted web page and convince a developer to visit it, causing the page to send requests to a vulnerable development server running on the developer's system, to execute code in the developer's context.
Affected software
Visual Studio
How to mitigate CVE-2026-96230
Install security update from vendor's website.
Visual Studio - update to 17.14.42