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Cloudinary: Failed transformation requests with combination of Strict Transformations and Auto-Upload

Affected components: Admin API - EUEU Datacenter - Admin API - EUAP Datacenter - Media Transformation API - APMedia Transformation API - APUpload API - USUS Datacenter - Upload API - USAP Datacenter - Upload API - APUpload API - APEU Datacenter - Upload API - EUUpload API - EUMedia Transformation API - USUS Datacenter - Media Transformation API - US

Timeline of updates

1. identified2025-12-15 15:10 UTC

   We are currently working to resolve a reported issue when using both Strict Transformations and the Auto-Upload feature. Until we resolve the issue, you may see "Transformation ... is not allowed" errors on requests that should trigger an auto upload from a remote URL or bucket. Until we resolve the issue, you can work around the issue by temporarily disabling Strict Transformations or using another method to allow the transformation to proceed such as signing the URL or adding an Strict Referral Domain: https://cloudinary.com/documentation/control_access_to_media#strict_transformations

2. identified2025-12-15 16:51 UTC

   We are working on deploying a fix for this issue; we'll provide a further update after the deployment is complete

3. monitoring2025-12-15 17:42 UTC

   A fix has been deployed and affected requests should now be working as expected. We'll resolve the incident after some further monitoring.

4. resolved2025-12-15 19:32 UTC

   This incident has been resolved.

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