Cloudflare Rewrote Their Core in Rust, Then Half of the Internet Went Down

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Cloudflare Rewrote Their Core in Rust, Then Half of the Internet Went Down

Bryan Lunduke

Nov 19, 2025

53 days after Cloudflare announced that their service was now “more secure” because they had ported it to Rust... an error in their Rust code caused a massive outage.

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The Lunduke Journal of Technology

Cloudflare Rewrote Their Core in Rust, Then Half of the Internet Went Down

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