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CVE-2026-33195

Rails Active Storage has possible Path Traversal in DiskService

Published: Mar 23, 2026Updated: Mar 24, 2026 Sources: CVE List NVD BDUCWE-22
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
0.6%
Top 55.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch 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.

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

Red Hat 3scale API Management PlatformRed Hat Inc.
SaaSSaaS Service
Cloud & SaaS / api-gateway
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Active StorageRails Core Team
Library
OSS Libraries / web-framework
activestoragerails
Library
OSS Libraries / web-framework
railsrubyonrailsOSS Libraries
red hat inc.commercialUSOperating Systemsaka red hat
ооо «ред софт»commercialRUOperating Systemsaka red soft
rails core teamoss-projectOSS Librariesaka rubyonrails, rails, actionview, rack? no
railsoss-projectOSS Librariesaka rails-html-sanitizer, activestorage
rubyonrailsoss-projectUSOSS Librariesaka rails, ruby on rails, rubyonrails.org

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Collection
Discovery
View detailed technique mapping

References

https://github.com/rails/rails
github.com
https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c
github.com
https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655
github.com
and 14 more references View all →

Timeline

Published
Mar 23, 2026
Last Updated
Mar 24, 2026

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