CVE-2026-73426

{
  "id": "CVE-2026-73426",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T15:17:08.043",
  "lastModified": "2026-10-22T22:10:00.250",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.17, Trix is vulnerable to cross-site scripting when a data-trix-serialized-attributes attribute bypasses the DOMPurify sanitizer. An attacker can craft HTML containing a data-trix-serialized-attributes attribute with a malicious payload that, when rendered, executes arbitrary JavaScript in the user's session and may perform unauthorized actions or disclose sensitive information. This issue is fixed in version 2.1.17."
    },
    {
      "lang": "es",
      "value": "Trix es un editor de texto enriquecido de lo que ves es lo que obtienes para la escritura diaria. Antes de 2.1.17, Trix es vulnerable a cross-site scripting cuando un atributo data-trix-serialized-attributes omite el saneador DOMPurify. Un atacante puede elaborar HTML que contiene un atributo data-trix-serialized-attributes con una carga útil maliciosa que, al renderizarse, ejecuta JavaScript arbitrario en la sesión del usuario y puede realizar acciones no autorizadas o divulgar información sensible. Este problema se corrige en la versión 2.1.17."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "basecamp",
          "product": "trix",
          "versions": [
            {
              "version": "< 2.1.17",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
          "baseScore": 4.6,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T17:19:19.823365Z",
          "id": "CVE-2026-73426",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/basecamp/trix/commit/3229c29c771ded4d247ed79b2ccd2cd05c4e74b4",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/basecamp/trix/commit/53197ab5a142e6b0b76127cb790726b274eaf1bc",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/basecamp/trix/pull/1282",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/basecamp/trix/releases/tag/v2.1.17",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/basecamp/trix/security/advisories/GHSA-qmpg-8xg6-ph5q",
      "source": "[email protected]"
    }
  ]
}