{"id":91,"date":"2026-10-29T06:55:55","date_gmt":"2026-10-29T06:55:55","guid":{"rendered":"https:\/\/bugskan.com\/?p=91"},"modified":"2026-10-29T06:55:55","modified_gmt":"2026-10-29T06:55:55","slug":"cursor-mcpoison-flaw-let-changed-tool-configurations-retain-earlier-approval","status":"publish","type":"post","link":"https:\/\/bugskan.com\/index.php\/2026\/10\/29\/cursor-mcpoison-flaw-let-changed-tool-configurations-retain-earlier-approval\/","title":{"rendered":"Cursor MCPoison flaw let changed tool configurations retain earlier approval"},"content":{"rendered":"<p>Check Point Research disclosed CVE-2025-54136 in August 2025. Cursor remembered approval for an MCP entry even after its underlying command or arguments changed, allowing a repository contributor to replace previously approved behavior.<\/p>\n<p>The researchers demonstrated code execution in this workflow. The attack required an initial approval and subsequent control over the configuration; it was not evidence that every Cursor installation had been compromised.<\/p>\n<p>Check Point says Cursor 1.3, released July 29, 2025, addressed the issue by requiring renewed approval after configuration changes. Teams should use a maintained release and review repository changes affecting local tools.<\/p>\n<p><a href=\"https:\/\/research.checkpoint.com\/2025\/cursor-vulnerability-mcpoison\/\">Read the original source<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Check Point\u2019s 2025 disclosure shows why tool approval must cover configuration changes, not just a trusted name.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"bugskan_incident_id":"inc_07863bb29e1d7a","bugskan_event_type":"vulnerability","bugskan_response":"REVIEW","bugskan_technical_severity":"","bugskan_technical_severity_source":"","bugskan_evidence_quality":"high","bugskan_affected_scope":"Previously approved, subsequently modified MCP configurations in affected Cursor versions.","bugskan_recommended_next_step":"Update Cursor and review changes to tool commands and arguments before approving them.","bugskan_who_should_check":"Teams running Cursor with repository-provided MCP tools.","bugskan_material_updated_at":"2025-08-05T00:00:00Z","bugskan_reviewer_name":"","bugskan_reviewed_at":"","bugskan_legacy_state":"mapped","bugskan_featured":false,"bugskan_sample":false,"footnotes":""},"categories":[1],"tags":[],"bugskan_format":[2],"bugskan_technology":[34],"class_list":["post-91","post","type-post","status-publish","format-standard","hentry","category-uncategorized","bugskan_format-security-brief","bugskan_technology-cursor"],"_links":{"self":[{"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/posts\/91","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/comments?post=91"}],"version-history":[{"count":1,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/posts\/91\/revisions"}],"predecessor-version":[{"id":323,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/posts\/91\/revisions\/323"}],"wp:attachment":[{"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/media?parent=91"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/categories?post=91"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/tags?post=91"},{"taxonomy":"bugskan_format","embeddable":true,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/bugskan_format?post=91"},{"taxonomy":"bugskan_technology","embeddable":true,"href":"https:\/\/bugskan.com\/index.php\/wp-json\/wp\/v2\/bugskan_technology?post=91"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}