CVE-2026-47645

Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.

Score

CVSS 3.1 8.8 High

Status

Analyzed - secure@microsoft.com

Published

2026-06-19

Last modified

2026-10-25

Weaknesses

CWE-601

Affected products

• 365 Copilot (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47645