Vulnerability in Viewcomponent View Component
CVE-2026-44837
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000
Affected products
- Viewcomponent View Component — versions >= 3.0.0, < 4.9.0
Weakness classification (CWE)
References
- github.com/ViewComponent/view_component/security/advisories/GHSA-hg3h-g7xc-f7vp (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-44837?
- CVE-2026-44837 is a medium-severity vulnerability in Viewcomponent View Component, classified under Partial String Comparison. CVSS score: 5.9/10. Published 2026-05-26.
- How severe is CVE-2026-44837?
- Medium severity. CVSS v3 base score is 5.9 out of 10.