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High

Kyverno before 1.18.0 Server-Side Request Forgery via apiCall

Type: advisorySources: OSV

Kyverno before 1.18.0 contains a server-side request forgery vulnerability in apiCall.service.url that allows authenticated users to send arbitrary HTTP requests by injecting user-controlled input through variable substitution. Attackers can target internal services, cloud metadata endpoints, and loopback addresses, with response data reflected in admission error messages enabling non-blind data exfiltration.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-84196
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 15:16 UTC · Revision 1

Source evidence

Kyverno before 1.18.0 Server-Side Request Forgery via apiCall

core-osv · Original source

Published 1 Sept 2026, 11:33 UTC

Kyverno before 1.18.0 contains a server-side request forgery vulnerability in apiCall.service.url that allows authenticated users to send arbitrary HTTP requests by injecting user-controlled input through variable substitution. Attackers can target internal services, cloud metadata endpoints, and loopback addresses, with response data reflected in admission error messages enabling non-blind data exfiltration.

osv:CVE-2026-84196
Complete source record
{
  "id": "25c5f64d7e919fecef36d00c97a76a54f005e037e2e0a14dfdd61427839dfc49",
  "url": "https://osv.dev/vulnerability/CVE-2026-84196",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Kyverno before 1.18.0 Server-Side Request Forgery via apiCall",
    "summary": "Kyverno before 1.18.0 contains a server-side request forgery vulnerability in apiCall.service.url that allows authenticated users to send arbitrary HTTP requests by injecting user-controlled input through variable substitution. Attackers can target internal services, cloud metadata endpoints, and loopback addresses, with response data reflected in admission error messages enabling non-blind data exfiltration.",
    "evidence": "osv:CVE-2026-84196",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-84196",
      "aliases": [
        "BIT-kyverno-2026-84196",
        "CVE-2026-84196",
        "GHSA-qr4g-8hrp-c4rw",
        "GO-2026-5594"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kyverno/kyverno",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "78e7560a5531fda5a39ffb119d7d8e47527d8aee"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.18.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.18.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.18.0-rc.1",
            "kyverno-policies-chart-3.8.0-rc.1",
            "kyverno-chart-3.8.0-rc.1",
            "1.9-dev",
            "1.8-dev",
            "1.7-dev",
            "test-dev",
            "1.6-dev",
            "helm-chart-v2.1.3",
            "v1.5.0-rc1",
            "helm-chart-v2.1.0",
            "v1.4.3",
            "helm-chart-v2.0.3",
            "v1.4.3-rc2",
            "helm-chart-v2.0.3-rc2",
            "v1.4.3-rc1",
            "helm-chart-v2.0.3-rc1",
            "v1.4.2",
            "v1.4.2-rc4",
            "v1.4.2-rc3",
            "v1.4.2-rc2",
            "v1.4.2-rc1",
            "v1.4.1",
            "v1.4.0-rc4",
            "v1.4.0",
            "v1.4.0-rc3",
            "v1.4.0-rc2",
            "v1.4.0-rc1",
            "v1.3.6",
            "v1.3.6-rc5",
            "v1.3.6-rc4",
            "v1.3.6-rc3",
            "v1.3.6-rc2",
            "v1.3.6-rc1",
            "v1.3.5",
            "v1.3.5-rc5",
            "v1.3.5-rc4",
            "v1.3.5-rc3",
            "v1.3.5-rc2",
            "v1.3.5-rc1",
            "v1.3.4",
            "v1.3.4-rc1",
            "v1.3.3",
            "v1.3.2",
            "v1.3.2-rc3",
            "v1.3.2-rc2",
            "v1.3.2-rc1",
            "v1.3.1",
            "v1.3.0",
            "v1.3.0-rc12",
            "v1.3.0-rc11",
            "v1.3.0-rc10",
            "1.3.0-rc10",
            "v1.3.0-rc9",
            "v1.3.0-rc8",
            "v1.3.0-rc7",
            "v1.3.0-rc6",
            "v1.3.0-rc5",
            "v1.3.0-rc4",
            "v1.3.0-rc3",
            "v1.3.0-rc2",
            "v1.3.0-rc1",
            "v1.2.1",
            "v1.2.0",
            "v1.1.12",
            "v1.1.11",
            "v1.1.10",
            "v1.1.9",
            "v1.1.8",
            "v1.1.7",
            "v1.1.7-rc4",
            "v1.1.7-rc3",
            "v1.1.7-rc2",
            "v1.1.7-rc1",
            "v1.1.6",
            "v1.1.6-rc5",
            "v1.1.6-rc4",
            "v1.1.6-rc3",
            "v1.1.6-rc2",
            "v1.1.6-rc1",
            "v1.1.5",
            "v1.1.4",
            "v1.1.4-rc1",
            "v1.1.3",
            "v1.1.3-rc1",
            "v1.1.2",
            "v1.1.1",
            "v1.0.0",
            "v1.0.0-rc1",
            "v0.11.0",
            "v0.10.0",
            "v0.9.1",
            "v0.9.0",
            "v0.8.0",
            "v0.7.1",
            "v0.7.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.0",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84196.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.024002966Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84196.json",
        "https://github.com/kyverno/kyverno/security/advisories/GHSA-qr4g-8hrp-c4rw",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-84196",
        "https://www.vulncheck.com/advisories/kyverno-before-1.18.0-server-side-request-forgery-via-apicall"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84196.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-84196",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496730,
  "published_at": "2026-09-01T11:33:59.097+00:00"
}