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# Cloudflare 526: The Redirect Loop Behind One Setting
- URL: https://debugly.dev/cloudflare-ssl-mode-526-redirect-loop/
- Published: 2026-08-17T13:00:00.000Z
- Updated: 2026-10-17T05:49:09.000Z
- Description: Flexible gives you an infinite redirect. Full strict gives you a 526. The documentation says Full or higher, and higher is the one that breaks.
- Author: Rohit Bhadani
- Tags: Networking, Error Autopsy, MicroVMs, DevOps

| Mode          | Cloudflare to origin                             | What happens against an HTTPS-redirecting origin |
| ------------- | ------------------------------------------------ | ------------------------------------------------ |
| Flexible      | plain HTTP                                       | Origin redirects to HTTPS, loop                  |
| Full          | HTTPS, certificate not validated                 | Works                                            |
| Full (strict) | HTTPS, certificate validated against a public CA | 526 if the origin certificate is internal        |

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Published on [debugly.dev](https://debugly.dev/) by [Rohit Bhadani](https://debugly.dev/about/) | Founder of [Krova Cloud](https://krova.cloud/?ref=debugly.dev)