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.

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.

EPSS: 0.004 (34.4th percentile) — read the EPSS interpretation.

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.

Affected products

Viewcomponent View_component — versions >= 3.0.0, < 4.9.0

Weakness classification (CWE)

CWE-187 — Partial String Comparison

References

security-advisories@github.com (x_refsource_CONFIRM, 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.