Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100704",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-26T13:23:59.326Z",
    "dateReserved": "2026-09-26T02:39:50.973Z",
    "datePublished": "2026-09-26T13:23:59.326Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-26T13:23:59.326Z"
      },
      "datePublic": "2026-09-10T00:00:00.000Z",
      "title": "Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass",
      "descriptions": [
        {
          "lang": "en",
          "value": "Kyverno is a policy engine for Kubernetes. In versions 1.14.0 through 1.19.0, the ImageValidatingPolicy (policies.kyverno.io/v1beta1) evaluator never reads the spec.images and spec.allowedValues fields of a PolicyException. Any PolicyException whose policyRefs and matchConditions match a resource causes image signature verification to be skipped for the entire resource rather than only for the listed images or values, so an exception intended to exempt a single trusted image exempts every image on the matched resource(s). As a result, unsigned or untrusted images can be admitted to the cluster without signature verification. This differs from ValidatingPolicy, GeneratingPolicy, and MutatingPolicy, which treat the same field as a partial exemption. The issue is fixed in version 1.19.1."
        }
      ],
      "affected": [
        {
          "vendor": "kyverno",
          "product": "kyverno",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1.14.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.19.1"
            },
            {
              "version": "1.19.1",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Incorrect Authorization",
              "cweId": "CWE-863",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/kyverno/kyverno/security/advisories/GHSA-5cjf-wwfg-pj4c",
          "name": "GitHub Security Advisory (GHSA-5cjf-wwfg-pj4c)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/kyverno-before-1.19.1-imagevalidatingpolicy-exception-bypass",
          "name": "VulnCheck Advisory: Kyverno before 1.19.1 ImageValidatingPolicy Exception Bypass",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "CHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "zanarellidev",
          "type": "reporter"
        }
      ]
    }
  }
}