CVE-2026-44837: medium-severity vulnerability in ViewComponent view_component
view_component: System Test Entry Point Path Check Allows Sibling Directory Escape
Published · Updated
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.9epss 0.4%
exploitation probability
0.4%top 72% of all CVEs
observed exploitation
nono source reports it
view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the system test entrypoint canonicalizes a user-controlled file path with File.realpath, then checks whether the resolved path starts with the temp directory path. This is not a safe containment check because sibling directories can share the same string prefix. This vulnerability is fixed in 4.9.0.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
ViewComponent · view_componentRelated CVEs — ViewComponent view_component
In the same product, most dangerous first.
CVE-2024-21636MEDIUMview_component Cross-site Scripting vulnerabilityEPSS 0.5%CVE-2026-54498HIGHview_component: around_render HTML-Safety BypassEPSS 0.5%CVE-2026-44836MEDIUMview_component: Preview Route Can Dispatch Inherited Helper MethodsEPSS 0.4%CVE-2026-54497MEDIUMview_component: Reused Component Instances Retain Stale Render ContextEPSS 0.3%