CVE-2026-33195

HIGH EPSS 44.4%
Published Mar 24, 20263mo ago · Modified Jun 17, 20262w ago
8.0 CVSS 4.0
High
Find Similar
Published Mar 24, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's `DiskService#path_for` does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. `../`) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

CVSS Details

Base Score
8.0
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
44.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 3

VendorProductVersionRange
rubyonrailsrails* <7.2.3.1
rubyonrailsrails*≥8.0.0  –  <8.0.4.1
rubyonrailsrails*≥8.1.0  –  <8.1.2.1

References 7

  • github.com https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c
    Patch
  • github.com https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655
    Patch
  • github.com https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348
    Patch
  • github.com https://github.com/rails/rails/releases/tag/v7.2.3.1
    Release Notes
  • github.com https://github.com/rails/rails/releases/tag/v8.0.4.1
    Release Notes
  • github.com https://github.com/rails/rails/releases/tag/v8.1.2.1
    Release Notes
  • github.com https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87
    Vendor Advisory

Remediation

  • github.com https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c
    Patch
  • github.com https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655
    Patch
  • github.com https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348
    Patch