{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.0",
  "cveMetadata": {
    "cveId": "CVE-2026-32288"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc"
      },
      "title": "Unbounded allocation for old GNU sparse in archive/tar",
      "descriptions": [
        {
          "lang": "en",
          "value": "tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive containing a large number of sparse regions encoded in the \"old GNU sparse map\" format."
        }
      ],
      "affected": [
        {
          "vendor": "Go standard library",
          "product": "archive/tar",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "archive/tar",
          "versions": [
            {
              "version": "0",
              "lessThan": "1.25.9",
              "status": "affected",
              "versionType": "semver"
            },
            {
              "version": "1.26.0-0",
              "lessThan": "1.26.2",
              "status": "affected",
              "versionType": "semver"
            }
          ],
          "programRoutines": [
            {
              "name": "Reader.readOldGNUSparseMap"
            },
            {
              "name": "readGNUSparseMap1x0"
            },
            {
              "name": "Reader.Next"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-400: Uncontrolled Resource Consumption"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://go.dev/cl/763766"
        },
        {
          "url": "https://go.dev/issue/78301"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4869"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Colin Walters (walters@verbum.org)"
        },
        {
          "lang": "en",
          "value": "Uuganbayar Lkhamsuren (https://github.com/uug4na)"
        },
        {
          "lang": "en",
          "value": "Jakub Ciolek"
        }
      ]
    }
  }
}