CVE-2024-49770: Oakserver Oak

High severity, CVSS 7.7. EPSS: 0.7% chance of exploitation in the next 30 days.

`oak` is a middleware framework for Deno's native HTTP server, Deno Deploy, Node.js 16.5 and later, Cloudflare Workers and Bun. By default `oak` does not allow transferring of hidden files with `Context.send` API. However, prior to version 17.1.3, this can be bypassed by encoding `/` as its URL encoded form `%2F`. For an attacker this has potential to read sensitive user data or to gain access to server secrets. Version 17.1.3 fixes the issue.

Affected products

• Oakserver Oak: before 17.1.3 (fixed in 17.1.3)

Published 2024-11-01. Last modified 2026-06-17.