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CVE-2026-33195

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/24/2026

Last Modified3/24/2026

Sourcenvd

Honeypot Sightings0

Affected Products

rubyonrails:rails

Weaknesses (CWE)

CWE-22

References

https://github.com/rails/rails/commit/4933c1e3b8c1bb04925d60347be9f69270392f2c(security-advisories@github.com)

https://github.com/rails/rails/commit/9b06fbc0f504b8afe333f33d19548f3b85fbe655(security-advisories@github.com)

https://github.com/rails/rails/commit/a290c8a1ec189d793aa6d7f2570b6a763f675348(security-advisories@github.com)

https://github.com/rails/rails/releases/tag/v7.2.3.1(security-advisories@github.com)

https://github.com/rails/rails/releases/tag/v8.0.4.1(security-advisories@github.com)

https://github.com/rails/rails/releases/tag/v8.1.2.1(security-advisories@github.com)

https://github.com/rails/rails/security/advisories/GHSA-9xrj-h377-fr87(security-advisories@github.com)

IOC Correlations

No correlations recorded

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