{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.3.5"
              },
              {
                "fixed": "0.8.5"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "5f181c659e12b04496da7aaae76257f77b7df627"
            },
            {
              "fixed": "54f79c38d93d061d6bf07eb75f0a4c1e78146c4d"
            },
            {
              "fixed": "181c8cb75351867535057817ada4802a90fe416e"
            }
          ],
          "repo": "https://github.com/ayuhito/modern-tar",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1284"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109380.json"
  },
  "details": "modern-tar 0.3.5 through 0.8.5 contains a memory exhaustion vulnerability that allows attackers to produce negative entry sizes via non-octal bytes parsed by readOctal(). Attackers can supply a crafted, optionally gzip-compressed, archive to unpackTar() that buffers chunks indefinitely, exhausting process memory and suppressing later entries.",
  "id": "CVE-2026-109380",
  "modified": "2026-10-14T02:30:17.059239731Z",
  "published": "2026-10-12T20:55:11.774Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109380.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109380"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/modern-tar-0.3.5-through-0.8.5-memory-exhaustion-via-malformed-octal-size-field"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ayuhito/modern-tar/commit/181c8cb75351867535057817ada4802a90fe416e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ayuhito/modern-tar/pull/195"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ayuhito/modern-tar"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/ayuhito/modern-tar/blob/v0.8.5/src/tar/encoding.ts"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "modern-tar 0.3.5 through 0.8.5 Memory Exhaustion via Malformed Octal Size Field"
}