CVE-2026-73426Trix: Stored XSS vulnerability through serialized attributes
Updated under an hour ago ()
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It affects basecamp trix. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
basecamp trix basecamp:trix (from the name) | before 2.1.17 | CNA record |
References
- https://github.com/basecamp/trix/security/advisories/GHSA-qmpg-8xg6-ph5qx-refsource-confirm
- https://github.com/basecamp/trix/pull/1282x-refsource-misc
- https://github.com/basecamp/trix/commit/3229c29c771ded4d247ed79b2ccd2cd05c4e74b4x-refsource-misc
- https://github.com/basecamp/trix/commit/53197ab5a142e6b0b76127cb790726b274eaf1bcx-refsource-misc
- https://github.com/basecamp/trix/releases/tag/v2.1.17x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.