XSS in Viewcomponent View Component
CVE-2026-54498
view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 4.0.0 until 4.12.0, ViewComponent::Base#around_render can return HTML-unsafe strings that bypass the escaping behavior applied to normal #call return values. This creates an XSS risk when downstream applications use around_render to wrap, replace, instrument, or conditionally return content that includes user-controlled data, and ViewComponent::Collection#render_in can amplify the issue by joining per-item results and marking the entire output html_safe, converting raw unsafe output into an ActiveSupport::SafeBuffer. This issue is fixed in version 4.12.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Viewcomponent View Component — versions >= 4.0.0, < 4.12.0
Weakness classification (CWE)
References
- github.com/ViewComponent/view_component/security/advisories/GHSA-97jw-64cj-jc58 (Exploit, Mitigation, Vendor Advisory)
- github.com/ViewComponent/view_component/commit/48e5fd2d602344c7d33019fbc5c8b087… (Patch)
- github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e533… (Patch)
- github.com/ViewComponent/view_component/releases/tag/v4.12.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-54498?
- CVE-2026-54498 is a high-severity vulnerability in Viewcomponent View Component, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-07-17.
- How severe is CVE-2026-54498?
- High severity. CVSS v3 base score is 8.7 out of 10.