CVE-2026-55602
- Source
- https://cve.org/CVERecord?id=CVE-2026-55602
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55602.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-55602
- Aliases
- Downstream
- Related
- Published
- 2026-06-22T15:58:08.699Z
- Modified
- 2026-07-08T08:14:00.537166316Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- http-proxy-middleware `router` host+path substring matching allows Host-header-driven backend routing bypass
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-187", "CWE-20" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55602.json" }- References
Affected packages
Git / github.com/chimurai/http-proxy-middleware
Affected ranges
- Type
- GIT
- Repo
- https://github.com/chimurai/http-proxy-middleware
- Events
- Database specific
{ "extracted_events": [ { "introduced": "0.16.0" }, { "fixed": "2.0.10" }, { "introduced": "3.0.0" }, { "fixed": "3.0.6" }, { "introduced": "4.0.0" }, { "fixed": "4.1.0" } ], "cpe": "cpe:2.3:a:chimurai:http-proxy-middleware:*:*:*:*:*:*:*:*", "source": "CPE_RANGE" }
Affected versions
v0.*
v0.16.0
v0.17.0
v0.17.1
v0.17.2
v0.17.3
v0.17.4
v0.18.0
v0.19.0
v0.19.1
v0.20.0
v0.20.0-beta.0
v0.21.0
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.1.0
v1.1.1
v1.1.2
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v2.*
v2.0.0
v2.0.1
v2.0.10-beta.0
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.0.6
v2.0.7
v2.0.7-beta.0
v2.0.7-beta.1
v2.0.8
v2.0.9
v3.*
v3.0.0
v3.0.1
v3.0.1-beta.0
v3.0.1-beta.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v4.*
v4.0.0
v4.1.0-beta.0
v4.1.0-beta.1
v4.1.0-beta.2