GHSA-F53H-MXV9-CP98

Vulnerability from github – Published: 2026-03-20 00:31 – Updated: 2026-03-20 17:26
VLAI?
Summary
ingress-nginx comment-based nginx configuration injection
Details

A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)

Severity ?
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "k8s.io/ingress-nginx"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20260319175635-5183b7d86137"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4342"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-20T17:26:08Z",
    "nvd_published_at": "2026-03-19T22:16:43Z",
    "severity": "HIGH"
  },
  "details": "A security issue was discovered in ingress-nginx where a combination of Ingress annotations can be used to inject configuration into nginx. This can lead to arbitrary code execution in the context of the ingress-nginx controller, and disclosure of Secrets accessible to the controller. (Note that in the default installation, the controller can access all Secrets cluster-wide.)",
  "id": "GHSA-f53h-mxv9-cp98",
  "modified": "2026-03-20T17:26:08Z",
  "published": "2026-03-20T00:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4342"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/kubernetes/issues/137893"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kubernetes/ingress-nginx/commit/5183b7d861377a9a2f6d2acaf44f8f6abd5cd0aa"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kubernetes/ingress-nginx"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/03/19/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ingress-nginx comment-based nginx configuration injection"
}


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