CVE-2026-44837: CWE-187: Partial String Comparison in ViewComponent view_component
CVE-2026-44837 is a medium severity vulnerability in the view_component Ruby on Rails framework versions 3. 0. 0 through 4. 8. x. The issue arises from an unsafe partial string comparison used to verify if a user-controlled file path is contained within a temporary directory. This check uses File. realpath and then tests if the resolved path starts with the temp directory path, which can be bypassed due to sibling directories sharing the same prefix. The vulnerability allows potential unauthorized file path access. It is fixed in version 4.
AI Analysis
Technical Summary
The view_component framework versions from 3.0.0 up to but not including 4.9.0 perform a containment check on user-controlled file paths by canonicalizing the path with File.realpath and then checking if the resolved path starts with the temp directory path. This partial string comparison is unsafe because sibling directories can share the same prefix, allowing an attacker to bypass the containment check. This is classified as CWE-187 (Partial Comparison). The vulnerability is addressed in version 4.9.0 of view_component.
Potential Impact
The vulnerability allows an attacker to potentially bypass directory containment checks in the system test entrypoint, which could lead to unauthorized access to files outside the intended temporary directory. The CVSS score of 5.9 (medium severity) reflects that the vulnerability is remotely exploitable without privileges or user interaction but requires a high attack complexity. The impact is limited to confidentiality as per the CVSS vector (C:H/I:N/A:N).
Mitigation Recommendations
A fix for this vulnerability is available in view_component version 4.9.0. Users should upgrade to version 4.9.0 or later to remediate this issue. Patch status is not explicitly stated beyond the fix in 4.9.0, so users should consult the official vendor advisory or repository for the latest remediation details.
CVE-2026-44837: CWE-187: Partial String Comparison in ViewComponent view_component
Description
CVE-2026-44837 is a medium severity vulnerability in the view_component Ruby on Rails framework versions 3. 0. 0 through 4. 8. x. The issue arises from an unsafe partial string comparison used to verify if a user-controlled file path is contained within a temporary directory. This check uses File. realpath and then tests if the resolved path starts with the temp directory path, which can be bypassed due to sibling directories sharing the same prefix. The vulnerability allows potential unauthorized file path access. It is fixed in version 4.
CVSS v3.1
Score 5.9medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The view_component framework versions from 3.0.0 up to but not including 4.9.0 perform a containment check on user-controlled file paths by canonicalizing the path with File.realpath and then checking if the resolved path starts with the temp directory path. This partial string comparison is unsafe because sibling directories can share the same prefix, allowing an attacker to bypass the containment check. This is classified as CWE-187 (Partial Comparison). The vulnerability is addressed in version 4.9.0 of view_component.
Potential Impact
The vulnerability allows an attacker to potentially bypass directory containment checks in the system test entrypoint, which could lead to unauthorized access to files outside the intended temporary directory. The CVSS score of 5.9 (medium severity) reflects that the vulnerability is remotely exploitable without privileges or user interaction but requires a high attack complexity. The impact is limited to confidentiality as per the CVSS vector (C:H/I:N/A:N).
Mitigation Recommendations
A fix for this vulnerability is available in view_component version 4.9.0. Users should upgrade to version 4.9.0 or later to remediate this issue. Patch status is not explicitly stated beyond the fix in 4.9.0, so users should consult the official vendor advisory or repository for the latest remediation details.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-07T21:21:48.352Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a16041de29bf47b505ea066
Added to database: 5/26/2026, 8:35:41 PM
Last enriched: 5/26/2026, 8:49:34 PM
Last updated: 5/27/2026, 4:48:46 AM
Views: 3
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