VDB
CVE-2026-55602
CVE-2026-55602
PUBLISHED
CVSS 6.9 MEDIUM
Reported by GitHub_M · Published June 22, 2026
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.
Risk Scores
CVSS 4.0
6.9
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| chimurai | http-proxy-middleware | >= 4.0.0, < 4.1.0, >= 3.0.0, < 3.0.6, >= 0.16.0, < 2.0.10 |
| wolfi | kubeflow-katib | 0, 0, 0 |
| chainguard | kubeflow-pipelines | 0, 0, 0 |
| chainguard | argo-workflows-4.0 | 0, 0, 0 |
| chainguard | argo-workflows-3.6 | 0, 0, 0 |
| chainguard | gitlab-rails-ce-18.11 | 0, 0, 0 |
| chainguard | gitlab-rails-ce-fips-18.11 | 0, 0, 0 |
| wolfi | argo-workflows-3.7 | 0, 0, 0 |
| chainguard | argo-workflows-3.7 | 0, 0, 0 |
| wolfi | argo-workflows-4.0 | 0, 0, 0 |
| wolfi | kubeflow-pipelines | 0, 0, 0 |
| chimurai | http-proxy-middleware | >= 0.16.0, < 2.0.10, >= 4.0.0, < 4.1.0, >= 0.16.0, < 2.0.10 |
| chainguard | kubeflow-katib | 0, 0, 0 |
| npm | http-proxy-middleware | 4.0.0, 0.16.0, 4.0.0 |
Timeline
- Jun 18, 2026 CVE Published
- Jun 21, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score