SearchLeak CVE-2026-42824 Copilot P2P Injection via Browser Launch URL

Ibrahim Saud@tektrix

•updated Jun 30, 2026•1•0•7

Detects browser processes (Chrome, Edge, Firefox, IE) being launched with a URL containing a crafted Microsoft 365 Copilot Search parameter (q=) with an unusually long command line. This pattern is indicative of potential exploitation attempts such as CVE-2026-42824 (SearchLeak), where attackers inject malicious payloads or HTML/script tags into the search query string to be processed by the browser.