{"id":76710,"date":"2026-02-09T12:31:16","date_gmt":"2026-02-09T09:01:16","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-25905-lack-of-isolation-in-mcp-run-python-leads-to-mcp-server-takeover\/"},"modified":"2026-02-09T12:31:16","modified_gmt":"2026-02-09T09:01:16","slug":"cve-2026-25905-lack-of-isolation-in-mcp-run-python-leads-to-mcp-server-takeover","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-25905-lack-of-isolation-in-mcp-run-python-leads-to-mcp-server-takeover\/","title":{"rendered":"CVE-2026-25905 &#8211; Lack of isolation in mcp-run-python leads to MCP server takeover"},"content":{"rendered":"<p>CVE ID : CVE-2026-25905<\/p>\n<p>Published :  Feb. 9, 2026, 9:01 a.m. | 18\u00a0minutes ago<\/p>\n<p>Description : The Python code being run by &#8216;runPython&#8217; or &#8216;runPythonAsync&#8217; is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server &#8211; for malicious purposes including MCP tool shadowing. Note &#8211; the &#8220;mcp-run-python&#8221; project is archived and unlikely to receive a fix.<\/p>\n<p>Severity: 5.8 | MEDIUM<\/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-2026-25905 Published : Feb. 9, 2026, 9:01 a.m. | 18\u00a0minutes ago Description : The Python code being run by &#8216;runPython&#8217; or &#8216;runPythonAsync&#8217; is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker &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-76710","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/76710","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=76710"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/76710\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=76710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=76710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=76710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}