Jun 2026: Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability
CVE-2026-47645 Published on June 19, 2026
Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability
Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.
Weakness Type
What is an Open Redirect Vulnerability?
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
CVE-2026-47645 has been classified to as an Open Redirect vulnerability or weakness.
Products Associated with CVE-2026-47645
Want to know whenever a new CVE is published for Microsoft 365 Copilot? stack.watch will email you.
