Regular Expression Denial of Service in Deno.upgradeWebSocket API
ImpactVersions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.PatchesIt is recommended that users upgrade to Deno 1.31.0.