CVE-2025-55152 MEDIUM

CVE-2025-55152: oak: ReDoS in x-forwarded-proto and x-forwarded-for headers

Vendor Oakserver
Product oak
Weakness CWE-400
Published August 9, 2025
Last update August 11, 2025
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

What the vulnerability does

01Description

oak is a middleware framework for Deno's native HTTP server, Deno Deploy, Node.js 16.5 and later, Cloudflare Workers and Bun. In versions 17.1.5 and below, it's possible to significantly slow down an oak server with specially crafted values of the x-forwarded-proto or x-forwarded-for headers.

Key dates

02Disclosure timeline

August 9, 2025 CVE published
August 11, 2025 Record updated