CVE-2026-57101 visual studio code vulnerability
Improper neutralization of input during web page generation ('cross-site scripting') in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally.
Quick answer
microsoft visual studio code should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- Review vendor advisory for affected versions.
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
Improper neutralization of input during web page generation ('cross-site scripting') in Visual Studio Code allows an unauthorized attacker to bypass a security feature locally. Treat this as a high priority developer workstation issue because Visual Studio Code often opens untrusted files, extensions, and web content. Update VS Code to the latest Microsoft release and remove untrusted extensions. Until every user is patched, avoid opening unknown workspaces or links from untrusted sources.
- Find all workstations that run Visual Studio Code and may be affected by CVE-2026-57101.
- Update VS Code from the official Microsoft channel or your software management tool.
- Remove extensions that are not needed or not from trusted publishers.
- Avoid opening unknown workspaces, repositories, links, and preview content until patched.
- Use workspace trust and keep unsafe tasks disabled for untrusted projects.
- Review endpoint alerts for suspicious VS Code child processes or script activity.
- Isolate any workstation that opened suspicious content before the update.
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Verify the fix
- Confirm VS Code reports the patched version on every affected workstation.
- Check that extension and workspace trust controls are active for CVE-2026-57101.
- Open a known safe test workspace and confirm VS Code works normally after the update.
- Review EDR logs for unusual command, shell, or browser activity launched from VS Code.
- Save the version report and any exception list.
Related categories
Trusted references
FAQ
What is affected by CVE-2026-57101?
microsoft visual studio code should be checked against the vendor advisory and trusted references linked on this page.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.