{"id":75670,"date":"2026-01-07T09:58:53","date_gmt":"2026-01-07T06:28:53","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-9611-microsoft-playwright-mcp-server-origin-header-validation-bypass\/"},"modified":"2026-01-07T09:58:53","modified_gmt":"2026-01-07T06:28:53","slug":"cve-2025-9611-microsoft-playwright-mcp-server-origin-header-validation-bypass","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-9611-microsoft-playwright-mcp-server-origin-header-validation-bypass\/","title":{"rendered":"CVE-2025-9611 &#8211; Microsoft Playwright MCP Server Origin Header Validation Bypass"},"content":{"rendered":"<p>CVE ID : CVE-2025-9611<\/p>\n<p>Published :  Jan. 7, 2026, 6:28 a.m. | 1\u00a0hour, 58\u00a0minutes ago<\/p>\n<p>Description : 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\u2019s web browser and send unauthorized requests to a locally running MCP server, resulting in unintended invocation of MCP tool endpoints.<\/p>\n<p>Severity: 0.0 | NA<\/p>\n<p>Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID : CVE-2025-9611 Published : Jan. 7, 2026, 6:28 a.m. | 1\u00a0hour, 58\u00a0minutes ago Description : 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\u2019s web browser and send unauthorized requests to a &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-75670","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=75670"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/75670\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=75670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=75670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=75670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}