Versions 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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| deno(crates.io) | 1.12.0 | 1.31.0 | N/A |
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