{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:shell-quote_project:shell-quote:*:*:*:*:*:node.js:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.8.4"
              },
              {
                "fixed": "1.9.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "db09fc7a9e3546807c19e2de2682ec31112a6520"
            }
          ],
          "repo": "https://github.com/ljharb/shell-quote",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-395f-4hp3-45gv"
  ],
  "database_specific": {
    "cna_assigner": "harborist",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13311.json"
  },
  "details": "shell-quote prior to 1.8.5 finalizes parsed tokens in parse() using Array.prototype.concat as a reduce accumulator, which reallocates and copies the entire growing array on every iteration. As a result parse() runs in O(n^2) time relative to the number of input tokens. An attacker who can supply an attacker-controlled string to any code path that calls parse() (no shell metacharacters are required; plain space-separated words suffice) can block the single-threaded Node.js event loop for an extended period with a small input, resulting in a denial of service. There is no code execution or data disclosure; impact is to availability only. Fixed in 1.8.5.",
  "id": "CVE-2026-13311",
  "modified": "2026-07-15T01:49:14.796782655Z",
  "published": "2026-06-25T04:48:36.351Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/shell-quote"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13311.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-395f-4hp3-45gv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13311"
    }
  ],
  "schema_version": "1.8.0",
  "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": "shell-quote parse() is quadratic in token count, enabling denial of service"
}