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Cloudflare makes strict service-token authentication the default for new Zero Trust organizations

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The setting changes how Access handles service-token requests and is mandatory for organizations created from October 5, 2026.

Cloudflare's Access changelog describes a strict service token authentication setting that standardizes handling of requests sent with service token headers. For failed authentication or authorization, Access responds with 401 or 403 instead of sending a 302 login-page redirect. Only Service Auth policies can authorize those requests, and Access disregards Allow policies. Failed requests involving recognized service tokens are recorded in Access authentication logs. Zero Trust organizations created on or after October 5, 2026 have the setting enabled by default and cannot disable it. Organizations created before October 5, 2026 can configure the setting through the dashboard or API, and Cloudflare recommends that existing organizations enable it.

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