TI-2026-32717 Aliases CVE-2026-44837 GHSA-hg3h-g7xc-f7vp

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

HIGH 66CWE-187Published 2026-05-26 · Updated 2026-05-28

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00412 35th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed view_component (ViewComponent): 4.9.0view_component (RubyGems): 4.9.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ViewComponent	view_component	3.0.0 to before 4.9.0	4.9.0	Patch available	CNA
—	view_component (RubyGems)	3.0.0 to before 4.9.0	4.9.0	Patch available	GHSA-hg3h-g7xc-f7vp

view_component VendorViewComponent Affected 3.0.0 to before 4.9.0 Fixed in 4.9.0 Patch available CNA
view_component (RubyGems) Vendor— Affected 3.0.0 to before 4.9.0 Fixed in 4.9.0 Patch available GHSA-hg3h-g7xc-f7vp

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:viewcomponent:view_component::::::ruby::*	3.0.0 to before 4.9.0	Vulnerable	ViewComponent

cpe:2.3:a:viewcomponent:view_component:*:*:*:*:*:ruby:*:* Versions 3.0.0 to before 4.9.0 Vulnerable ·ViewComponent

Remediation

Fix · CNA view_component (ViewComponent) Fixed in 4.9.0
Fix · GHSA-hg3h-g7xc-f7vp view_component (RubyGems) Fixed in 4.9.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-44837
2026-10-03 Alias added: GHSA-hg3h-g7xc-f7vp

References

Exploit 1

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

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-44837

Other 2

TI-2026-39344 view_component: around_render HTML-Safety Bypass CVSS 3.1HIGH 8.7
TI-2026-39343 view_component: Reused Component Instances Retain Stale Render Context CVSS 3.1MEDIUM 6.8
TI-2024-14361 view_component Cross-site Scripting vulnerability CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences