{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73428","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-08-12T14:32:11.796Z","datePublished":"2026-08-13T22:04:19.121Z","dateUpdated":"2026-08-14T18:06:36.864Z"},"containers":{"cna":{"title":"Trix: Stored XSS via HTMLParser attribute injection on paste","problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.6,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/basecamp/trix/security/advisories/GHSA-53g2-mvcc-q9x3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/basecamp/trix/security/advisories/GHSA-53g2-mvcc-q9x3"},{"name":"https://github.com/basecamp/trix/pull/1293","tags":["x_refsource_MISC"],"url":"https://github.com/basecamp/trix/pull/1293"},{"name":"https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c","tags":["x_refsource_MISC"],"url":"https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c"},{"name":"https://github.com/basecamp/trix/releases/tag/v2.1.18","tags":["x_refsource_MISC"],"url":"https://github.com/basecamp/trix/releases/tag/v2.1.18"}],"affected":[{"vendor":"basecamp","product":"trix","versions":[{"version":"< 2.1.18","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-13T22:04:19.121Z"},"descriptions":[{"lang":"en","value":"Trix is a what-you-see-is-what-you-get rich text editor for everyday writing. Prior to 2.1.18, Trix is vulnerable to stored cross-site scripting when crafted HTML is pasted into the editor. HTMLParser processes a mock attachment in a `<span>` with an empty `data-trix-attachment=\"{}\"` value, causing data-trix-attributes to be applied to a plain string piece. StringPiece.fromJSON accepts an unvalidated href, allowing a javascript: URI to enter the document model and serialized HTML and execute when another user renders and clicks the content. Applications that apply server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18."}],"source":{"advisory":"GHSA-53g2-mvcc-q9x3","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-14T17:39:35.455077Z","id":"CVE-2026-73428","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-14T18:06:36.864Z"}}]}}