# CDN Accept negotiation returned WebP instead of AVIF

*30 September 2026 · Cloudflare, Performance, Image editing*

Found a bug in image delivery service. Accept negotiation: with Accept: image/avif returned WebP, not AVIF.

CDN now send AVIF first.

[View original on X](https://x.com/mohitdotdev/status/2105178564744417336)