Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the implicit-render implementation in Ruby on Rails before 3.2.18, 4.0.x before 4.0.5, and 4.1.x before 4.1.1, when certain route globbing configurations are enabled, allows remote attackers to read arbitrary files via a crafted request.
Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the implicit-render implementation in Ruby on Rails before 3.2.18, 4.0.x before 4.0.5, and 4.1.x before 4.1.1, when certain route globbing configurations are enabled, allows remote attackers to read arbitrary files via a crafted request.
Why this VPI (explainable, experimental)
VPI breakdown
| Impact | 75.00 |
| Exploitation signal(KEV listed) | ×1.50 |
| VPI | 100.00 |
VPI formula vpi-v1
Required Action
Apply updates per vendor instructions.
| Source | CVSS Version | Base Score | Severity | Vector String | Assessment Date |
|---|---|---|---|---|---|
| OSV3rd | 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:H | 04/21/2026 |
| NVDNIST | 3.1 | 7.5 |
| CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 04/20/2026 |
| NVDNIST | 2.0 | 4.3 | MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N | 04/20/2026 |