GHSA-GMQ8-994R-JV83

Vulnerability from github – Published: 2026-03-12 00:31 – Updated: 2026-03-16 12:35
VLAI
Summary
yauzl contains an off-by-one error
Details

yauzl (aka Yet Another Unzip Library) version 3.2.0 for Node.js contains an off-by-one error in the NTFS extended timestamp extra field parser within the getLastModDate() function. The while loop condition checks cursor < data.length + 4 instead of cursor + 4 <= data.length, allowing readUInt16LE() to read past the buffer boundary. A remote attacker can cause a denial of service (process crash via ERR_OUT_OF_RANGE exception) by sending a crafted zip file with a malformed NTFS extra field. This affects any Node.js application that processes zip file uploads and calls entry.getLastModDate() on parsed entries. Fixed in version 3.2.1.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "yauzl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.0"
            },
            {
              "fixed": "3.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.2.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-31988"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-193"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-13T18:58:11Z",
    "nvd_published_at": "2026-03-11T23:16:00Z",
    "severity": "MODERATE"
  },
  "details": "yauzl (aka Yet Another Unzip Library) version 3.2.0 for Node.js contains an off-by-one error in the NTFS extended timestamp extra field parser within the getLastModDate() function. The while loop condition checks cursor \u003c data.length + 4 instead of cursor + 4 \u003c= data.length, allowing readUInt16LE() to read past the buffer boundary. A remote attacker can cause a denial of service (process crash via ERR_OUT_OF_RANGE exception) by sending a crafted zip file with a malformed NTFS extra field. This affects any Node.js application that processes zip file uploads and calls entry.getLastModDate() on parsed entries. Fixed in version 3.2.1.",
  "id": "GHSA-gmq8-994r-jv83",
  "modified": "2026-03-16T12:35:31Z",
  "published": "2026-03-12T00:31:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31988"
    },
    {
      "type": "WEB",
      "url": "https://github.com/thejoshwolfe/yauzl/commit/c4695215b05c6adffda613b9051a2a85429b33fe"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/thejoshwolfe/yauzl"
    },
    {
      "type": "WEB",
      "url": "https://www.codeant.ai/security-research/yauzl-denial-of-service-zip-file-crash"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/yauzl"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/yauzl-denial-of-service-via-off-by-one-error-in-ntfs-timestamp-parser"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "yauzl contains an off-by-one error"
}


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