Picomatch through 4.0.7 ReDoS via single-branch repeated extglob patterns

{
  "id": "62d13244c6a128f4c9c1624cc6ee2f053544f3cf7e714d36681db584138866b6",
  "url": "https://osv.dev/vulnerability/CVE-2026-112366",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Picomatch through 4.0.7 ReDoS via single-branch repeated extglob patterns",
    "summary": "Picomatch through 4.0.7 contains a regular expression denial of service vulnerability that allows attackers to block the event loop by supplying single-branch repeated extglob patterns. Attackers can provide globs like +(*) or +(*a), which analyzeRepeatedExtglob in lib/parse.js skips, causing exponential backtracking against short crafted strings and denying service to Node.js applications.",
    "evidence": "osv:CVE-2026-112366",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-112366",
      "aliases": [
        "CVE-2026-112366"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/micromatch/picomatch",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "6bb40679c218cefba5d4e9662408c5fdf699a8bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.0.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.0.7"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.0.7",
            "4.0.6",
            "4.0.5",
            "4.0.4",
            "3.0.1",
            "2.3.1",
            "4.0.3",
            "4.0.2",
            "4.0.1",
            "3.0.0",
            "2.3.0",
            "2.2.3",
            "2.2.2",
            "2.1.0",
            "2.0.7",
            "2.0.6",
            "2.0.5",
            "2.0.4",
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "1.1.2",
            "1.1.0",
            "1.0.2",
            "1.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112366.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.068272104Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112366.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-112366",
        "https://www.vulncheck.com/advisories/picomatch-through-4.0.7-redos-via-single-branch-repeated-extglob-patterns",
        "https://github.com/micromatch/picomatch/pull/194",
        "https://github.com/micromatch/picomatch",
        "https://github.com/micromatch/picomatch/blob/4.0.7/lib/parse.js#L287-L307"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1333"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112366.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-112366",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505444,
  "published_at": "2026-10-19T15:29:00.491+00:00"
}