4.6

CVE-2026-73426: basecamp trix Cross-site Scripting

CVSS: 4.6v3.1MediumDeferred
AliasesCGA-73f9-vwwp-8gmcCGA-cgj5-99m9-h6ffCGA-m926-7p32-frw9
Published 18-08-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-73426 is a medium (CVSS 4.6) Cross-site Scripting vulnerability in basecamp trix. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23.6% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.6/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.32%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-08-2026
    PublishedVulnerability first disclosed.
  2. 18-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

+0.08 pp

From 0.24% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.32%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard4 products
  • ruby3.2-rails-8.1< 8.1.3-r0
  • ruby3.3-rails-8.1< 8.1.2.1-r0
  • ruby3.4-rails-8.1< 8.1.2.1-r0
  • ruby4.0-rails-8.1< 8.1.2.1-r0
Wolfi4 products
  • ruby3.2-rails-8.1< 8.1.3-r0
  • ruby3.3-rails-8.1< 8.1.2.1-r0
  • ruby3.4-rails-8.1< 8.1.2.1-r0
  • ruby4.0-rails-8.1< 8.1.2.1-r0
Basecamp1 product
Npm1 product
  • trix< 2.1.17
RubyGems1 product
  • action_text-trix< 2.1.17

5 vendors · 11 products

References

9 links