Report that #letsencrypt is handling a vulnerability:
"[Investigating] The tls-sni challenge has been disabled due to strong credibility of a vulnerability report."
https://letsencrypt.status.io/pages/incident/55957a99e800baa4470002da/5a55777ed9a9c1024c00b241
Impact to #golang
"Welp, the #golang autocert (https://golang.org/x/crypto/acme/autocert …) @letsencrypt package is now broken because it relies on tls-sni-01, which just got emergency shut down:"
yeah. not a good night for the internets.
@emv Hooboy...