CVE-2026-55602
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
http-proxy-middleware `router` host+path substring matching allows Host-header-driven backend routing bypass
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
http-proxy-middleware
- Vendor
- chimurai
- Product
- http-proxy-middleware
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| >= 4.0.0, < 4.1.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 3.0.0, < 3.0.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 0.16.0, < 2.0.10 | affected | Unavailable | Unavailable | Unavailable | None listed |