{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "8.0.5.2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "8.1"
                  },
                  {
                    "fixed": "8.1.4.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "009ea68342d05d02087c04dae7faaa4e4c1def11"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v8.0.5.2",
                "range": [
                  {
                    "fixed": "235c597b100321b6bd2d62f8df63707f42b25b2d"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "v8.1.4.1",
                "range": [
                  {
                    "fixed": "3f290b759c8e2ffe7c257951b1255740751355e4"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "range": [
                  {
                    "fixed": "adc3a32d4abea77ed3aacf6f5fb71cfc005bef73"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "235c597b100321b6bd2d62f8df63707f42b25b2d"
            },
            {
              "introduced": "1cdd190a25e483b65f1f25bbd0f13a25d696b461"
            },
            {
              "fixed": "3f290b759c8e2ffe7c257951b1255740751355e4"
            },
            {
              "fixed": "009ea68342d05d02087c04dae7faaa4e4c1def11"
            },
            {
              "fixed": "adc3a32d4abea77ed3aacf6f5fb71cfc005bef73"
            }
          ],
          "repo": "https://github.com/rails/rails",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2p2f-4rq4-gjwc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126079.json"
  },
  "details": "Action View is a framework for handling view template lookup and rendering and provides view helpers for building HTML. Prior to 8.1.4.1 and 8.0.5.2, with the HTML5 sanitizer (Rails::HTML5::Sanitizer, the default vendor on CRuby for applications using load_defaults 7.1 or later), Nokogiri before 1.19.5 serializes \u003c and \u003e unescaped inside attribute values. The Action View text helpers highlight and simple_format sanitize their input and then process the resulting HTML as a string: highlight splits it on tag boundaries to insert matches, and simple_format splits it into paragraphs on blank lines. An unescaped \u003e or a blank line inside an attribute value could cause markup in that value, which the sanitizer left inert, to be emitted as live elements in the helper's html_safe output, possibly leading to XSS. Applications that use the HTML5 sanitizer and pass untrusted text to highlight, or to simple_format with html_options, are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.",
  "id": "CVE-2026-126079",
  "modified": "2026-11-12T02:30:37.153182667Z",
  "published": "2026-11-10T21:02:30.667Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v8.0.5.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rails/rails/releases/tag/v8.1.4.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126079.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/rails/rails/security/advisories/GHSA-2p2f-4rq4-gjwc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126079"
    },
    {
      "type": "FIX",
      "url": "http://github.com/rails/rails/commit/adc3a32d4abea77ed3aacf6f5fb71cfc005bef73"
    },
    {
      "type": "FIX",
      "url": "https://github.com/rails/rails/commit/009ea68342d05d02087c04dae7faaa4e4c1def11"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Action View: Possible XSS vulnerability in Action View text helpers"
}