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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
rails activestorage affected
Version Status Constraints
>= 8.1.0.beta1, < 8.1.2.1 affected —
>= 8.0.0.beta1, < 8.0.4.1 affected —
< 7.2.3.1 affected —

Configuration 1 [-]

OR cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*

No data.

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Vendors Products
Rails Subscribe
Activestorage Subscribe

Project Subscriptions

Vendors Products
Rails Subscribe
Activestorage Subscribe
Rubyonrails Subscribe
Rails Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-9xrj-h377-fr87 Rails Active Storage has possible Path Traversal in DiskService
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c cve-icon cve-icon cve-icon
https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655 cve-icon cve-icon cve-icon
https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348 cve-icon cve-icon cve-icon
https://github.com/rails/rails/releases/tag/v7.2.3.1 cve-icon cve-icon cve-icon
https://github.com/rails/rails/releases/tag/v8.0.4.1 cve-icon cve-icon cve-icon
https://github.com/rails/rails/releases/tag/v8.1.2.1 cve-icon cve-icon cve-icon
https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-33195 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-33195 cve-icon
History

Tue, 24 Mar 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Rubyonrails
Rubyonrails rails
CPEs cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
Vendors & Products Rubyonrails
Rubyonrails rails
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N'}

 cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Tue, 24 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 24 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N'}

threat_severity

Important

Tue, 24 Mar 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Rails
Rails activestorage
Vendors & Products Rails
Rails activestorage

Tue, 24 Mar 2026 02:30:00 +0000

Type Values Removed Values Added
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.
Title Rails Active Storage has possible Path Traversal in DiskService
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 8, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-24T14:11:19.263Z

Reserved: 2026-03-17T22:16:36.721Z

Link: CVE-2026-33195

cve-icon Vulnrichment

Updated: 2026-03-24T14:11:13.687Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-24T00:16:28.987

Modified: 2026-03-24T17:55:45.480

Link: CVE-2026-33195

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-23T23:31:41Z

Links: CVE-2026-33195 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-24T10:29:52Z

Weaknesses