{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:is.js_project:is.js:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.9.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "8516199ca608055188020f2b7a20559e465a39be"
            }
          ],
          "repo": "https://github.com/arasatasaygin/is.js",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop “forever.\" This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.",
  "id": "CVE-2020-26302",
  "modified": "2026-07-08T05:38:49.974331737Z",
  "published": "2022-12-22T21:15:08.877Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://github.com/arasatasaygin/is.js/issues/320"
    },
    {
      "type": "EVIDENCE",
      "url": "https://securitylab.github.com/advisories/GHSL-2020-295-redos-is.js"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}