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CVE-2026-44837

view_component: System Test Entry Point Path Check Allows Sibling Directory Escape

Published: May 26, 2026Updated: May 26, 2026 Sources: CVE List NVD
NVD MITRE
5.9CVSS
MEDIUM

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 Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-187

Affected Products

view_component
ViewComponent

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/ViewComponent/view_component/security/advisories/GHSA-hg3h-g7xc-f7vp
github.com

Timeline

Published
May 26, 2026
Last Updated
May 26, 2026

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