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ingress-nginx rewrite-target nginx configuration injection

Type: advisorySources: OSV

A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress annotation 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.)

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-3288
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 17:17 UTC · Revision 1

Source evidence

ingress-nginx rewrite-target nginx configuration injection

core-osv · Original source

Published 9 Mar 2026, 21:00 UTC

A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress annotation 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.)

osv:CVE-2026-3288
Complete source record
{
  "id": "ddfd2362757e5d74cfeaac8d2443aad3b7ce65bd8c99d8fabe6a8ae32f4b0816",
  "url": "https://osv.dev/vulnerability/CVE-2026-3288",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ingress-nginx rewrite-target nginx configuration injection",
    "summary": "A security issue was discovered in ingress-nginx where the `nginx.ingress.kubernetes.io/rewrite-target` Ingress annotation 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.)",
    "evidence": "osv:CVE-2026-3288",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-3288",
      "aliases": [
        "CVE-2026-3288"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kubernetes/ingress-nginx",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "86931b9dd804f21d41619b419b25896eacc05d1a"
                },
                {
                  "introduced": "ad643baabbbf55d59c60e75330a193545aa8b788"
                },
                {
                  "fixed": "dfd0e62d63ecea42f4fbacf0b4aee14206b29264"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.13.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.14.0"
                      },
                      {
                        "fixed": "1.14.4"
                      }
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                    "source": "CPE_RANGE"
                  }
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              }
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            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3288.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.617414540Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3288.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-3288",
        "https://github.com/kubernetes/kubernetes/issues/137560",
        "https://github.com/kubernetes/ingress-nginx",
        "https://github.com/bvabhishek/CVE-2026-3288-lab"
      ],
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        "cna_assigner": "kubernetes",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3288.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-3288",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497766,
  "published_at": "2026-03-09T21:00:48.196+00:00"
}