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Microsoft Security Response CenterCVE-2026-37236

grpc-gateway v2.28.0 is vulnerable to Incorrect Access Control. The application processes the X-HTTP-Method-Override header in ServeMux.ServeHTTP without restricting allowed methods. When a POST request with Content-Type application/x-www-form-urlencoded includes this header, the request method is rewritten to an arbitrary attacker-supplied value before routing. This allows bypassing method-based access controls enforced by upstream proxies or WAFs.

Mariner

Read the vendor bulletin Get alerts for azl3 cert-manager 1.12.15-11 on Azure Linux
5.3CVSS out of 10Medium severity
Scope

What the vendor says is affected

  • azl3 cert-manager 1.12.15-11 on Azure Linux 3.0
  • azl3 cf-cli 8.7.11-8 on Azure Linux 3.0
  • azl3 cloud-provider-kubevirt 0.5.1-6 on Azure Linux 3.0
  • azl3 docker-buildx 0.14.0-16 on Azure Linux 3.0
  • azl3 docker-compose 2.27.0-13 on Azure Linux 3.0
  • azl3 etcd 3.5.33-1 on Azure Linux 3.0
  • azl3 flannel 0.24.2-29 on Azure Linux 3.0
  • azl3 containerd2 2.2.4-6 on Azure Linux 3.0
  • azl3 cri-tools 1.32.0-7 on Azure Linux 3.0
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-37236View CVSS, KEV, EPSS, and threat context
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