Microsoft to Block Unauthorized Scripts in Entra ID Logins with 2026 CSP Update
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Microsoft is implementing a stricter Content Security Policy (CSP) for Entra ID authentication, which will block unauthorized scripts from executing during sign-in. Organizations using browser extensions or third-party tools that inject scripts into login.microsoftonline.com must replace these tools before the enforcement date, as they will cease to function while users can still sign in successfully.
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