Security advisory

{
  "id": "be2ec5d76320aad04d408d998062c4898976ec18b7b28c9a2565a737b7c77949",
  "url": "https://osv.dev/vulnerability/CVE-2020-26291",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-26291",
    "summary": "URI.js is a javascript URL mutation library (npm package urijs). In URI.js before version 1.19.4, the hostname can be spoofed by using a backslash (`\\`) character followed by an at (`@`) character. If the hostname is used in security decisions, the decision may be incorrect. Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior. For example the URL `https://expected-example.com\\@observed-example.com` will incorrectly return `observed-example.com` if using an affected version. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class. Version 1.19.4 is patched against all known payload variants. Version 1.19.3 has a partial patch but is still vulnerable to a payload variant.]",
    "evidence": "osv:CVE-2020-26291",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-26291",
      "aliases": [
        "CVE-2020-26291",
        "GHSA-3329-pjwv-fjpg"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/medialize/uri.js",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "bf04ec5f053829f9ea3a887608bdfca4fd84cd64"
                },
                {
                  "fixed": "b02bf037c99ac9316b77ff8bfd840e90becf1155"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:uri.js_project:uri.js:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.19.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b02bf037c99ac9316b77ff8bfd840e90becf1155"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "bf04ec5f053829f9ea3a887608bdfca4fd84cd64"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.19.4"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.19.3",
            "v1.19.2",
            "v1.19.1",
            "v1.19.0",
            "v1.18.12",
            "v1.18.11",
            "v1.18.10",
            "v1.18.9",
            "v1.18.8",
            "v1.18.7",
            "v1.18.6",
            "v1.18.5",
            "v1.18.4",
            "v1.18.3",
            "v1.18.2",
            "v1.18.1",
            "v1.18.0",
            "v1.17.1",
            "v1.17.0",
            "v1.16.0",
            "v1.15.2",
            "v1.15.1",
            "v.1.15.1",
            "v1.15.0",
            "v1.14.0",
            "v1.13.2",
            "v1.13.1",
            "v1.13.0",
            "v1.12.1",
            "v1.12.0",
            "v1.10.2",
            "v1.10.1",
            "v1.10.0",
            "v1.9.1",
            "v1.9.0",
            "v1.8.3",
            "v1.8.2",
            "v1.8.1",
            "v1.8.0",
            "v1.7.4",
            "v1.7.3",
            "v1.7.2",
            "v1.7.1",
            "v1.7.0",
            "v1.6.3",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.5.0",
            "v1.4.3",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.3.1",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26291.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:57.056566648Z",
      "provider": "osv",
      "references": [
        "https://github.com/medialize/URI.js/releases/tag/v1.19.4",
        "https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpg",
        "https://www.npmjs.com/package/urijs",
        "https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-26291",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384083,
  "published_at": "2020-12-31T00:15:12.327+00:00"
}