CVE-2026-44837

MEDIUM

5.9

CVSS v3

Description

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.

CWE-187

How to fix

Remediation Available

ruby-view-componentDebian

Fixed in:4.12.0-1CVE-2026-44837

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.41%probability of exploitation in 30 days

34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Exploit1

github.com

Related Vulnerabilities

Other CWE-187 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-41110	Critical	9.9	16%	-	Fix
CVE-2022-31802	Critical	9.8	1.2%	-	Fix
CVE-2024-39742	High	8.1	0.8%	-	Fix
CVE-2026-35031	Critical	9.9	0.8%	-	Fix
CVE-2026-34785	High	7.5	0.4%	-	Fix
CVE-2026-55602	High	8.6	0.4%	-	Fix

Common questions

How do I fix CVE-2026-44837?

Upgrade ruby-view-component on debian unstable to 4.12.0-1 or later.

Is CVE-2026-44837 being actively exploited?

Not that we know of. CVE-2026-44837 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.41% is the estimated probability that it will be exploited in the next 30 days. That is higher than 34% of all scored CVEs.

How severe is CVE-2026-44837?

CVE-2026-44837 has a CVSS v3 base score of 5.9, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-44837 affect?

Published advisories record a fix for ruby-view-component (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-24.