H2O versions 2.0.3 and earlier and 2.1.0-beta2 and earlier allows remote attackers to cause a denial-of-service (DoS) via format string specifiers in a template file via fastcgi, mruby, proxy, redirect or reproxy.Referenceshttps://github.com/h2o/h2o/issues/1077https://jvn.jp/en/jp/JVN94779084/index.html
