Vulnerability CVE-2023-26103
Published: 2023-02-25

Description:
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.

 References:
https://github.com/denoland/deno/pull/17722
https://github.com/denoland/deno/blob/2b247be517d789a37e532849e2e40b724af0918f/ext/http/01_http.js%23L395-L409
https://github.com/denoland/deno/commit/cf06a7c7e672880e1b38598fe445e2c50b4a9d06
https://github.com/denoland/deno/releases/tag/v1.31.0
https://security.snyk.io/vuln/SNYK-RUST-DENO-3315970
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