Skip to content
Threat Feed
high advisory

CVE-2026-41611: Visual Studio Code XSS Vulnerability

CVE-2026-41611 is a cross-site scripting (XSS) vulnerability in Visual Studio Code that allows an attacker to execute code locally due to improper neutralization of script-related HTML tags.

CVE-2026-41611 describes a cross-site scripting (XSS) vulnerability affecting Visual Studio Code. The vulnerability stems from the improper neutralization of script-related HTML tags within a web page rendered by the application. This allows an attacker to inject malicious scripts that can be executed locally within the context of the user’s Visual Studio Code instance. Successful exploitation could lead to information disclosure, modification of VS Code settings, or potentially even arbitrary code execution depending on the privileges of the user. Defenders should apply the appropriate patches released by Microsoft to remediate this vulnerability.

Attack Chain

  1. An attacker crafts a malicious HTML page containing script-related HTML tags (e.g., <script>, <svg onload>).
  2. The attacker entices a user to open the malicious HTML page within Visual Studio Code or a component rendering HTML within VS Code.
  3. Visual Studio Code improperly neutralizes the script-related HTML tags.
  4. The injected script executes within the context of the Visual Studio Code application.
  5. The attacker gains the ability to read sensitive information, such as environment variables, file contents, or VS Code settings.
  6. The attacker modifies VS Code settings to further compromise the system or gain persistence.
  7. The attacker executes arbitrary code within the VS Code process.
  8. The attacker escalates privileges or compromises other systems on the network, depending on the user’s permissions and network configuration.

Impact

Successful exploitation of CVE-2026-41611 can lead to local code execution within the context of the Visual Studio Code application. This can result in the theft of sensitive information, modification of VS Code settings, and potentially complete system compromise depending on the privileges of the user. The number of potential victims is dependent on the adoption rate of Visual Studio Code.

Recommendation

  • Apply the patch released by Microsoft to remediate CVE-2026-41611, as referenced in the Microsoft advisory.
  • Deploy the Sigma rule to detect suspicious process execution originating from Visual Studio Code to identify potential exploitation attempts.
  • Educate users about the dangers of opening untrusted HTML files within Visual Studio Code.

Detection coverage 2

Detects CVE-2026-41611 Exploitation — Suspicious Process Execution from Visual Studio Code

high

Detects CVE-2026-41611 exploitation — monitors for suspicious process execution originating from Visual Studio Code, indicative of XSS leading to code execution.

sigma tactics: execution, initial_access techniques: T1059.001, T1204.002 sources: process_creation, windows

Detects CVE-2026-41611 Exploitation — VS Code Spawning Unusual Network Connections

medium

Detects CVE-2026-41611 exploitation — monitors for unusual network connections originating from Visual Studio Code, which may indicate code execution leading to command and control or data exfiltration.

sigma tactics: command_and_control, exfiltration techniques: T1041, T1071.001 sources: network_connection, windows

Detection queries are available on the platform. Get full rules →