Security advisory

{
  "id": "646585f7879d24f45dca4d15869422724250592b99e279b5072be498b842c78a",
  "url": "https://osv.dev/vulnerability/CVE-2021-23364",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23364",
    "summary": "The package browserslist from 4.0.0 and before 4.16.5 are vulnerable to Regular Expression Denial of Service (ReDoS) during parsing of queries.",
    "evidence": "osv:CVE-2021-23364",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-23364",
      "aliases": [
        "CVE-2021-23364",
        "GHSA-w8qv-6jwh-64r5"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/browserslist/browserslist",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2a66017404213d054c39bfdf75e8d34ebe278cac"
                },
                {
                  "fixed": "7cc2aedd0047d800d44aa0259c02b6db1414105c"
                },
                {
                  "fixed": "c091916910dfe0b5fd61caad96083c6709b02d98"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:browserslist_project:browserslist:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.16.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c091916910dfe0b5fd61caad96083c6709b02d98"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.16.3",
            "4.16.2",
            "4.16.1",
            "4.16.0",
            "4.15.0",
            "4.14.7",
            "4.14.6",
            "4.14.5",
            "4.14.4",
            "4.14.3",
            "4.14.2",
            "4.14.1",
            "4.14.0",
            "4.13.0",
            "4.12.2",
            "4.12.1",
            "4.12.0",
            "4.11.1",
            "4.11.0",
            "4.10.0",
            "4.9.1",
            "4.9.0",
            "4.8.7",
            "4.8.6",
            "4.8.5",
            "4.8.4",
            "4.8.3",
            "4.8.2",
            "4.8.1",
            "4.8.0",
            "4.7.3",
            "4.7.2",
            "4.7.1",
            "4.7.0",
            "4.6.6",
            "4.6.5",
            "4.6.4",
            "4.6.3",
            "4.6.2",
            "4.6.1",
            "4.6.0",
            "4.5.6",
            "4.5.5",
            "4.5.3",
            "4.5.2",
            "4.5.1",
            "4.5.0",
            "4.4.2",
            "4.4.1",
            "4.4.0",
            "4.3.7",
            "4.3.6",
            "4.3.5",
            "4.3.3",
            "4.3.2",
            "4.3.1",
            "4.3.0",
            "4.2.1",
            "4.2.0",
            "4.1.2",
            "4.1.1",
            "4.1.0",
            "4.0.2",
            "4.0.1",
            "4.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23364.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:32.474271218Z",
      "provider": "osv",
      "references": [
        "https://github.com/browserslist/browserslist/blob/e82f32d1d4100d6bc79ea0b6b6a2d281a561e33c/index.js%23L472-L474",
        "https://github.com/browserslist/browserslist/pull/593",
        "https://github.com/browserslist/browserslist/commit/c091916910dfe0b5fd61caad96083c6709b02d98",
        "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1277182",
        "https://snyk.io/vuln/SNYK-JS-BROWSERSLIST-1090194"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-23364",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385520,
  "published_at": "2021-04-28T16:15:08.133+00:00"
}