Contrast before 1.23.1 Image Substitution via Policy Generation

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100833",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-27T01:28:32.099Z",
    "dateReserved": "2026-09-26T23:23:03.410Z",
    "datePublished": "2026-09-27T01:28:32.099Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-27T01:28:32.099Z"
      },
      "datePublic": "2026-08-24T00:00:00.000Z",
      "title": "Contrast before 1.23.1 Image Substitution via Policy Generation",
      "descriptions": [
        {
          "lang": "en",
          "value": "Contrast (edgelesssys/contrast) versions 1.14.0 before 1.23.1 generate runtime policies that fail to detect all container image substitutions. A bad rebase during a Kata Containers update accidentally introduced an `allow_storage` rule that accepts storage entries using the `image_guest_pull` driver without verifying the image digest. An attacker with access to the Kata agent API — for example, a Kubernetes cluster administrator in Contrast's threat model — can therefore substitute a container image with an exploit payload, provided the substituted image satisfies the remaining policy rules, undermining the confidential container's integrity guarantees."
        }
      ],
      "affected": [
        {
          "vendor": "edgelesssys",
          "product": "contrast",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1.14.0",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "1.23.1"
            },
            {
              "version": "1.23.1",
              "status": "unaffected",
              "versionType": "semver"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Improper Input Validation",
              "cweId": "CWE-20",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/edgelesssys/contrast/security/advisories/GHSA-m2qg-wrxv-h898",
          "name": "GitHub Security Advisory (GHSA-m2qg-wrxv-h898)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/contrast-before-1.23.1-image-substitution-via-policy-generation",
          "name": "VulnCheck Advisory: Contrast before 1.23.1 Image Substitution via Policy Generation",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "sespiros",
          "type": "finder"
        },
        {
          "lang": "en",
          "value": "burgerdev",
          "type": "finder"
        }
      ]
    }
  }
}