GHSA-64mm-vxmg-q3vj

http-proxy-middleware `router` host+path substring matching allows Host-header-driven backend routing bypass

Medium highest severity reported · also known as CVE-2026-55602

1
catalog tools match this advisory
0
ship the vulnerable code in their release binary (Go tools analyzed with govulncheck)
No
in the CISA KEV catalog
0.4%
EPSS for CVE-2026-55602, percentile 32

Catalog tools matching GHSA-64mm-vxmg-q3vj

ToolVersion scannedPackageFixed inReleased binaryDeclared in or found inDispute
cloudsplaining
Cloud Security
0.9.1http-proxy-middleware@2.0.9
npm
2.0.10not analyzedpackage-lock.jsonDispute

Vulnerabilities are known advisories that Grype matches against the dependencies declared in each project's release source (manifests and lockfiles, including development and build dependencies). A match does not mean the tool is exploitable: the vulnerable code may be unused, test-only, or not shipped in the released binary. KEV: listed in the CISA Known Exploited Vulnerabilities catalog. EPSS: FIRST's estimated probability of exploitation in the next 30 days. Both describe the vulnerability in general, not its exploitability through this tool; a match in a workflow file refers to a GitHub Action, not to shipped code. Released binary is only analyzed for Go tools with a Linux release binary; other tools show not analyzed.

Advisory sources

GitHub advisory GHSA-64mm-vxmg-q3vj · NVD CVE-2026-55602 · OSV GHSA-64mm-vxmg-q3vj

Grype data sources: https://github.com/advisories/GHSA-64mm-vxmg-q3vj