FireTofu
4 real? Tracking exploitation and patching of eMudhra’s weak keys

Technology · en

4 real? Tracking exploitation and patching of eMudhra’s weak keys

Cloudflare Blog · Official source · Oct 30, 2026, 5:38 PM UTC

Four, just four: that’s the key to break into any unpatched connection on the Internet that is using eMudhra certificates. Here’s how we quickly patched Cloudflare, what evidence we can see of attempted exploitation, and how much of the rest of the Internet remains exposed.