Which versions of @playwright/mcp are affected by CVE-2025-9611?

@playwright/mcp (npm) versions < 0.0.40 is affected.

Is there a fix for CVE-2025-9611?

Yes. CVE-2025-9611 is fixed in 0.0.40. Upgrade to this version or later.

Is CVE-2025-9611 exploitable, and should I be worried?

Whether CVE-2025-9611 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2025-9611 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2025-9611 in @playwright/mcp

Q: What is CVE-2025-9611?

CVE-2025-9611 is a high-severity security vulnerability in @playwright/mcp (npm), affecting versions < 0.0.40. It is fixed in 0.0.40.

Q: Is there a fix for CVE-2025-9611?

Yes. CVE-2025-9611 is fixed in 0.0.40. Upgrade to this version or later.

Q: Is CVE-2025-9611 exploitable, and should I be worried?

Whether CVE-2025-9611 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2025-9611 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2025-9611?

Upgrade @playwright/mcp to 0.0.40 or later.

CVE-2025-9611

CVE-2025-9611 is a high-severity security vulnerability in @playwright/mcp (npm), affecting versions < 0.0.40. It is fixed in 0.0.40.

Does this CVE actually affect you?

Kodem shows which CVEs are reachable and running in your applications, so you fix what's exploitable, not just what's listed.

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form.

Runtime intelligence, not another scanner.

Summary

Microsoft Playwright MCP Server vulnerable to DNS Rebinding Attack; Allows Attackers Access to All Server Tools

Microsoft Playwright MCP Server versions prior to 0.0.40 fails to validate the Origin header on incoming connections. This allows an attacker to perform a DNS rebinding attack via a victim’s web browser and send unauthorized requests to a locally running MCP server, resulting in unintended invocation of MCP tool endpoints.

Impact

Affected versions

@playwright/mcp (< 0.0.40)

Security releases

@playwright/mcp → 0.0.40 (npm)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

Already deployed Kodem?

See it in your environment New to Kodem? Get a demo →

Remediation advice

Upgrade @playwright/mcp to 0.0.40 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2025-9611? CVE-2025-9611 is a high-severity security vulnerability in @playwright/mcp (npm), affecting versions < 0.0.40. It is fixed in 0.0.40.
Which versions of @playwright/mcp are affected by CVE-2025-9611? @playwright/mcp (npm) versions < 0.0.40 is affected.
Is there a fix for CVE-2025-9611? Yes. CVE-2025-9611 is fixed in 0.0.40. Upgrade to this version or later.
Is CVE-2025-9611 exploitable, and should I be worried? Whether CVE-2025-9611 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2025-9611 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2025-9611? Upgrade @playwright/mcp to 0.0.40 or later.