# CVE-2026-73426: Trix: Stored XSS vulnerability through serialized attributes

> CVE-2026-73426: Trix: Stored XSS vulnerability through serialized attributes. CVSS 4.6 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-73426
Last updated: 2026-10-22T22:10:00Z

- Published: 2026-08-18 14:24 UTC · Updated: 2026-10-22 22:10 UTC · Assigner: GitHub\_M
- CVSS: 4.6 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- EPSS: 0.32%, 25th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-79

## Description

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.

## Affected vendors and products

- basecamp: trix

## Tracked companies

- [Basecamp](https://rewindex.com/company/basecamp.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-73426)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-73426)
- [https://github.com/basecamp/trix/commit/3229c29c771ded4d247ed79b2ccd2cd05c4e74b4](https://github.com/basecamp/trix/commit/3229c29c771ded4d247ed79b2ccd2cd05c4e74b4)
- [https://github.com/basecamp/trix/commit/53197ab5a142e6b0b76127cb790726b274eaf1bc](https://github.com/basecamp/trix/commit/53197ab5a142e6b0b76127cb790726b274eaf1bc)
- [https://github.com/basecamp/trix/pull/1282](https://github.com/basecamp/trix/pull/1282)
- [https://github.com/basecamp/trix/releases/tag/v2.1.17](https://github.com/basecamp/trix/releases/tag/v2.1.17)
- [https://github.com/basecamp/trix/security/advisories/GHSA-qmpg-8xg6-ph5q](https://github.com/basecamp/trix/security/advisories/GHSA-qmpg-8xg6-ph5q)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-73426 · Markdown: https://rewindex.com/cve/CVE-2026-73426.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-73426 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:46.091Z