{"id":"CVE-2026-73427","revision":null,"records":[{"revision":"f00845726abd48379de1d3e8cfad19d9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73427","aliases":[],"title":"Trix: XSS via JSON deserialization bypass in drag-and-drop (Level0InputController)","description":"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 cross-site scripting when a crafted application/x-trix-document JSON payload is dropped into an editor using the fallback Level0InputController, such as an embedded WebView without Input Events Level 2 support. The StringPiece.fromJSON method trusts href attributes from the JSON payload without sanitization, allowing a draggable element containing a javascript: URI to bypass DOMPurify sanitization and inject executable JavaScript into the DOM. Exploitation requires the victim to drag and drop attacker-controlled content, and server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18.","state":0,"publishedAt":"2026-08-12T20:50:17.434+00:00","modifiedAt":"2026-08-13T13:51:28.767+00:00","affected":[{"ecosystem":"Vendor product","name":"trix","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"basecamp\",\n                    \"product\": \"trix\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.1.18\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":2.1,"severity":"LOW"}],"references":["https://github.com/basecamp/trix/security/advisories/GHSA-53p3-c7vp-4mcc","https://github.com/basecamp/trix/pull/1293","https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c","https://github.com/basecamp/trix/releases/tag/v2.1.18"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73427","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73427","identifiers":["CVE-2026-73427"]},"retained":false,"historicalAffected":[]},{"revision":"4e7313e141104f82850d43b75c91d974","observedAt":"2026-10-25T15:19:09.409+00:00","statement":{"source":"nvd","id":"CVE-2026-73427","aliases":[],"title":"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 cross-site scripting when a crafted application/x-trix-document JSON payload is dropped into an editor using the fallback L…","description":"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 cross-site scripting when a crafted application/x-trix-document JSON payload is dropped into an editor using the fallback Level0InputController, such as an embedded WebView without Input Events Level 2 support. The StringPiece.fromJSON method trusts href attributes from the JSON payload without sanitization, allowing a draggable element containing a javascript: URI to bypass DOMPurify sanitization and inject executable JavaScript into the DOM. Exploitation requires the victim to drag and drop attacker-controlled content, and server-side HTML sanitization can neutralize the payload on save. This issue is fixed in version 2.1.18.","state":0,"publishedAt":"2026-08-12T21:17:41.613+00:00","modifiedAt":"2026-10-24T15:10:00.19+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":2.1,"severity":"LOW"}],"references":["https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c","https://github.com/basecamp/trix/pull/1293","https://github.com/basecamp/trix/releases/tag/v2.1.18","https://github.com/basecamp/trix/security/advisories/GHSA-53p3-c7vp-4mcc"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73427","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-79"],"productCriteria":[],"sourceDates":{"published":"2026-08-12T21:17:41.613","lastModified":"2026-10-24T15:10:00.190"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-73427","identifiers":["CVE-2026-73427"]},"retained":false,"historicalAffected":[]},{"revision":"3a3dae04f14241f496358f399459b35b","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-53p3-c7vp-4mcc","aliases":["CVE-2026-73427"],"title":"Trix is vulnerable to XSS through JSON deserialization bypass in drag-and-drop (Level0InputController)","description":"### Impact\n\nThe Trix editor, in versions prior to 2.1.18, is vulnerable to XSS when a crafted `application/x-trix-document` JSON payload is dropped into the editor in environments using the fallback Level0InputController (e.g., embedded WebViews lacking Input Events Level 2 support).\n\nThe `StringPiece.fromJSON` method trusted `href` attributes from the JSON payload without sanitization. An attacker could craft a draggable element containing a `javascript:` URI in the href attribute that, when dropped into a vulnerable editor, would bypass DOMPurify sanitization and inject executable JavaScript into the DOM.\n\nExploitation requires a specific environment (Level0InputController fallback) and social engineering (victim must drag and drop attacker-controlled content into the editor). Applications using server-side HTML sanitization (such as Rails' built-in sanitizer) are additionally protected, as the payload is neutralized on save.\n\n### Patches\n\nUpdate Recommendation: Users should upgrade to Trix editor version 2.1.18 or later.\n\n\n### References\n\nThe XSS vulnerability was responsibly reported by Hackerone researcher [newbiefromcoma](https://hackerone.com/newbiefromcoma).","state":0,"publishedAt":"2026-03-29T15:22:17+00:00","modifiedAt":"2026-09-10T03:50:59.7224583+00:00","affected":[{"ecosystem":"npm","name":"trix","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.1.18"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"RubyGems","name":"action_text-trix","ranges":[{"type":"ECOSYSTEM","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"2.1.18"}]}],"versions":["0.0.1","2.1.15","2.1.16","2.1.17"],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://github.com/basecamp/trix/security/advisories/GHSA-53p3-c7vp-4mcc","https://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c","https://github.com/basecamp/trix","https://github.com/basecamp/trix/releases/tag/v2.1.18","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/action_text-trix/GHSA-53p3-c7vp-4mcc.yml"],"sourceUrl":"https://github.com/advisories/GHSA-53p3-c7vp-4mcc","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-53p3-c7vp-4mcc","identifiers":["GHSA-53p3-c7vp-4mcc","CVE-2026-73427"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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