6.9
Medium
CVE-2026-55602 http-proxy-middleware is node.js http-proxy middleware
Description
http-proxy-middleware is node.js http-proxy middleware. From 0.16.0 until 2.0.10, 3.0.6, and 4.1.0, http-proxy-middleware documents router proxy-table entries as host, path, or host+path selectors, but the host+path implementation uses unanchored substring matching on attacker-controlled request metadata. As a result, a crafted Host header that is only a superstring match for a configured host+path key can still route a request to an unintended backend. This vulnerability is fixed in 2.0.10, 3.0.6, and 4.1.0.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| http-proxy-middleware 4.0 | 4.0.0 → < 4.1.0 | 4.1.0 |
| http-proxy-middleware 3.0 | 3.0.0 → < 3.0.6 | 3.0.6 |
| http-proxy-middleware 0.16 | 0.16.0 → < 2.0.10 | 2.0.10 |
Other CVEs of http-proxy-middleware
The 5 CVEs of http-proxy-middleware →
CVE-2026-55603
http-proxy-middleware is node.js http-proxy middleware
7.5
High
CVE-2025-32996
In http-proxy-middleware before 2.0.8 and 3.x before 3.0.4, writeBody can be called twice because "else if" is not used
4.0
Medium
CVE-2025-32997
In http-proxy-middleware before 2.0.9 and 3.x before 3.0.5, fixRequestBody proceeds even if bodyParser has failed
4.0
Medium
CVE-2024-21536
Versions of the package http-proxy-middleware before 2.0.7, from 3.0.0 and before 3.0.3 are vulnerable to Denial of…
7.5
High