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Rules - Remove surrounding bytes with trim functions

UpdateyesterdayUnverifiedAdded Oct 15, 2026

Cloudflare Rules supports three new functions for removing surrounding bytes. Use them to remove whitespace before comparing request values. All HTTP products support these functions on all plans: trim() removes bytes from both ends. trim_start() removes bytes from the start. trim_end() removes bytes from the end.

Topics: Pricing

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WAF Release - 2026-10-14 - Emergency

This emergency release adds a new managed rule to block active exploitation of a critical remote code execution (RCE) vulnerability found in popular web frameworks.

Also shipped on Oct 14, 2026

Cloudflare in October 2026