{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.0.0"
                  },
                  {
                    "fixed": "2.9.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "b8a59cc0e03f8704f1d7c8122fc8f7ef8548362d"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "addressable-2.9.1",
                "range": [
                  {
                    "fixed": "afa66636d9fdcca11e03c85cf166651e0efa68ef"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "126259d1ef0315fa0b1cad07b8194748763e2bf2"
            },
            {
              "fixed": "afa66636d9fdcca11e03c85cf166651e0efa68ef"
            },
            {
              "fixed": "b8a59cc0e03f8704f1d7c8122fc8f7ef8548362d"
            }
          ],
          "repo": "https://github.com/sporkmonger/addressable",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9crm-g4mf-wc5j"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1007",
      "CWE-20"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126348.json"
  },
  "details": "Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.0.0 until 2.9.1, the pure-Ruby Addressable::IDNA.to_unicode implementation decodes invalid Punycode A-labels instead of returning them unchanged. Labels that decode to ASCII text or fail to convert back to the same A-label can therefore make Addressable::URI#display_uri show a trusted-looking host while host, normalized_host, and the connection target retain the attacker-controlled encoded host. A trusted-name comparison using Addressable::IDNA.to_unicode output can also treat two different hosts as the same without displaying the URI. The native libidn implementation, to_ascii, and normalized_host are unaffected. This issue is fixed in version 2.9.1.",
  "id": "CVE-2026-126348",
  "modified": "2026-11-14T02:30:28.942649896Z",
  "published": "2026-11-12T21:57:55.237Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sporkmonger/addressable/releases/tag/addressable-2.9.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126348.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/sporkmonger/addressable/security/advisories/GHSA-9crm-g4mf-wc5j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126348"
    },
    {
      "type": "FIX",
      "url": "https://github.com/sporkmonger/addressable/commit/b8a59cc0e03f8704f1d7c8122fc8f7ef8548362d"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Addressable display_uri can show misleading hosts with invalid Punycode A-labels"
}