CVE-2025-25200
EUVD-2025-408612.02.2025, 18:15
Koa is expressive middleware for Node.js using ES2017 async functions. Prior to versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3, Koa uses an evil regex to parse the `X-Forwarded-Proto` and `X-Forwarded-Host` HTTP headers. This can be exploited to carry out a Denial-of-Service attack. Versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3 fix the issue.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| koajs | koa | 𝑥 < 0.21.2 |
| koajs | koa | 1.0.0 ≤ 𝑥 < 1.7.1 |
| koajs | koa | 2.0.0 ≤ 𝑥 < 2.15.4 |
| koajs | koa | 3.0.0:alpha0 |
| koajs | koa | 3.0.0:alpha1 |
| koajs | koa | 3.0.0:alpha2 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References