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CVE-2026-33195

Rails Active Storage has possible Path Traversal in DiskService

Published: Mar 23, 2026Updated: Jul 15, 2026 Sources: CVE List NVD BDUCWE-22
9.8CRITICAL
NVD MITRE
EPSS Score
0.6%
Top 56.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-22

Affected Products

rails
oss-projectaka rails-html-sanitizer, activestorage
activestorageLibrary
OSS Libraries / web-framework
rubyonrails
oss-project·USaka ruby on rails, rails, rubyonrails.org
rails
OSS Libraries
Red Hat Inc.
commercial·USaka red hat
Red Hat 3scale API Management PlatformOn-prem
Operating Systems / linux-distro
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
Rails Core Team
oss-projectaka rack? no, rubyonrails, rails, actionview
Active StorageLibrary
OSS Libraries / web-framework

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87
github.com
https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c
github.com
https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655
github.com
and 17 more references View all →

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