CVE-2026-32288 (GCVE-0-2026-32288)
Vulnerability from cvelistv5
Published
2026-04-08 01:06
Modified
2026-04-13 18:20
Summary
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.
Impacted products
Vendor Product Version
Go standard library archive/tar Version: 0   
Version: 1.26.0-0   
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Show details on NVD website


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              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-32288",
                "options": [
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                    "Exploitation": "none"
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-13T17:51:05.649111Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
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        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "archive/tar",
          "product": "archive/tar",
          "programRoutines": [
            {
              "name": "Reader.readOldGNUSparseMap"
            },
            {
              "name": "readGNUSparseMap1x0"
            },
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              "name": "Reader.Next"
            }
          ],
          "vendor": "Go standard library",
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              "version": "0",
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      "credits": [
        {
          "lang": "en",
          "value": "Colin Walters (walters@verbum.org)"
        },
        {
          "lang": "en",
          "value": "Uuganbayar Lkhamsuren (https://github.com/uug4na)"
        },
        {
          "lang": "en",
          "value": "Jakub Ciolek"
        }
      ],
      "descriptions": [
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          "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."
        }
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              "description": "CWE-400: Uncontrolled Resource Consumption",
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          "url": "https://go.dev/cl/763766"
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          "url": "https://go.dev/issue/78301"
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          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4869"
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      ],
      "title": "Unbounded allocation for old GNU sparse in archive/tar"
    }
  },
  "cveMetadata": {
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    "dateReserved": "2026-03-11T16:38:46.557Z",
    "dateUpdated": "2026-04-13T18:20:08.191Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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    }
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}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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