{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.19.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2a5f2b256d9b0d8517d4653ed4e8bd7d39fb44f3"
            }
          ],
          "repo": "https://github.com/edgelesssys/contrast",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rh99-wc69-c255"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-59"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100838.json"
  },
  "details": "Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CLI contained a flaw in the CopyFile verification that allowed arbitrary writes to the guest root filesystem. A malicious process on the untrusted host able to connect to the Kata agent VSOCK could issue a series of CopyFile requests to overwrite security-critical files in the guest or trick the workload into disclosing sensitive data, effectively amounting to a full guest takeover. Users unable to upgrade can apply an equivalent rego policy fix passed to 'contrast generate --policy'.",
  "id": "CVE-2026-100838",
  "modified": "2026-10-01T03:30:52.159749263Z",
  "published": "2026-09-27T01:28:35.498Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100838.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/edgelesssys/contrast/security/advisories/GHSA-rh99-wc69-c255"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100838"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/contrast-before-1.19.1-copyfile-policy-symlink-subversion"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Contrast before 1.19.1 CopyFile Policy Symlink Subversion"
}