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.
CVE-2026-73427
This low-severity CVE scores 2.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 2.1
- EG Score
- 2.1LOWmedium confidence
- EG Risk
- 10EG Risk 10/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity21% × 45%Exploitation1% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.6%
- EPSS %ILE
- 45th
- KEV
- Not listed
CISA SSVCTrack at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
August 12, 2026
Last Modified
September 9, 2026
References (4)
- security-advisories@githubhttps://github.com/basecamp/trix/commit/9c0a993d9fc2ffe9d56b013b030bc238f9c0557c
- security-advisories@githubhttps://github.com/basecamp/trix/pull/1293
- security-advisories@githubhttps://github.com/basecamp/trix/releases/tag/v2.1.18
- security-advisories@githubhttps://github.com/basecamp/trix/security/advisories/GHSA-53p3-c7vp-4mcc
Vendor Advisories for CVE-2026-73427(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(2 across 2 ecosystems)
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| trix | — |
| — |
RubyGems(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| action_text-trix | 0.0.1, 2.1.15, 2.1.16, 2.1.17 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 29× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-06 17:39 UTCEG score recompute
- 2026-10-06 15:18 UTCEPSS rescore
- 2026-10-05 17:43 UTCEPSS rescore
- 2026-10-04 23:22 UTCEPSS rescore
- 2026-10-03 19:55 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescore
- 2026-10-01 19:50 UTCEPSS rescore
- 2026-09-30 21:52 UTCEG score recompute
- 2026-09-29 15:24 UTCEPSS rescore
- 2026-09-28 13:52 UTCEPSS rescore
- 2026-09-27 13:48 UTCEPSS rescore
- 2026-09-27 09:51 UTCEG score recompute
- 2026-09-26 15:59 UTCEPSS rescore
- 2026-09-24 10:26 UTCEG score recompute
- 2026-09-21 21:09 UTCEPSS rescore
- 2026-09-21 12:41 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescore
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-18 14:43 UTCEG score recompute
- 2026-09-16 14:08 UTCEPSS rescore
- 2026-09-16 05:15 UTCEPSS rescore
- 2026-09-15 16:59 UTCEG score recompute
- 2026-09-15 03:12 UTCEPSS rescore
- 2026-09-12 19:13 UTCEG score recompute
- 2026-09-12 15:02 UTCEPSS rescore
Show 42 moreShow fewer
- 2026-09-11 14:53 UTCEPSS rescore
- 2026-09-10 09:35 UTCEPSS rescore
- 2026-09-09 05:10 UTCEG score recompute
- 2026-09-08 22:01 UTCEPSS rescore
- 2026-09-06 13:48 UTCEPSS rescore
- 2026-09-05 21:44 UTCEG score recompute
- 2026-09-04 05:07 UTCEPSS rescore
- 2026-09-02 23:57 UTCEG score recompute
- 2026-09-02 14:12 UTCEPSS rescore
- 2026-09-01 13:54 UTCEPSS rescore
- 2026-09-01 04:40 UTCEPSS rescore
- 2026-09-01 04:40 UTCEPSS rescore
- 2026-08-31 02:12 UTCEG score recompute
- 2026-08-30 19:18 UTCEPSS rescore
- 2026-08-30 19:17 UTCEPSS rescore
- 2026-08-30 01:22 UTCEPSS rescore
- 2026-08-28 21:42 UTCEPSS rescore
- 2026-08-28 04:28 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescore
- 2026-08-26 14:47 UTCEPSS rescore
- 2026-08-25 13:49 UTCEPSS rescore
- 2026-08-25 06:36 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescore
- 2026-08-22 08:40 UTCEG score recompute
- 2026-08-21 23:49 UTCEPSS rescore
- 2026-08-20 22:56 UTCEPSS rescore
- 2026-08-19 17:04 UTCEPSS rescore
- 2026-08-19 10:55 UTCEG score recompute
- 2026-08-18 13:49 UTCEPSS rescore
- 2026-08-18 13:49 UTCEPSS rescore
- 2026-08-17 13:47 UTCEPSS rescore
- 2026-08-16 14:56 UTCEPSS rescore
- 2026-08-16 14:56 UTCEPSS rescore
- 2026-08-16 13:11 UTCEG score recompute
- 2026-08-16 02:15 UTCEPSS rescore
- 2026-08-15 01:31 UTCEPSS rescore
- 2026-08-13 22:00 UTCEPSS rescore
- 2026-08-13 15:26 UTCEG score recompute
- 2026-08-13 14:24 UTCEG score recompute
- 2026-08-12 21:20 UTCEG score recompute
- 2026-08-12 21:01 UTCEG score recompute
- 2026-08-12 21:00 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
7 shownRubyGems:action_text-trix · npm:trix
Frequently asked(5)
What is CVE-2026-73427?
When was CVE-2026-73427 disclosed?
Is CVE-2026-73427 actively exploited?
What is the CVSS score of CVE-2026-73427?
How do I remediate CVE-2026-73427?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-73427
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