{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.2.3"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "43e8b7feece8beb0fcba47059ec9b522fd929a64"
            },
            {
              "fixed": "ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017"
            }
          ],
          "repo": "https://github.com/helm/helm",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-129"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63308.json"
  },
  "details": "Helm through 4.2.3, fixed in commit ba6c9a2, contains a denial of service vulnerability in the Files.Lines template helper in pkg/engine/files.go that allows attackers to trigger an index out of range panic by including zero-length byte slices in chart files. Attackers can include empty files in Helm charts to cause deterministic render failures across template, install, upgrade, lint, and SDK Engine.Render operations.",
  "id": "CVE-2026-63308",
  "modified": "2026-07-19T03:31:04.061455125Z",
  "published": "2026-07-17T16:14:15.472Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63308.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63308"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/chat2db-insecure-direct-object-reference-via-get-api-connection-datasource"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/helm/helm/pull/32290"
    },
    {
      "type": "FIX",
      "url": "https://github.com/helm/helm/commit/ba6c9a29efa7bf9198dad6a5ec12b4fb30c96017"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/helm/helm"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/helm/helm/issues/32279"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Helm Files.Lines Denial of Service via Empty Chart Files"
}