# Active Storage allowed transformation methods potentially unsafe
Active Storage attempts to prevent the use of potentially unsafe image
transformation methods and parameters by default.
The default allowed list contains three methods allow for the circumvention
of the safe defaults which enables potential command injection
vulnerabilities in cases where arbitrary user supplied input is accepted as
valid transformation methods or parameters.
Impact
------
This vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor.
Vulnerable code will look something similar to this:
```
<%= image_tag blob.variant(params[:t] => params[:v]) %>
```
Where the transformation method or its arguments are untrusted arbitrary input.
All users running an affected release should either upgrade or use one of the workarounds immediately.
Workarounds
-----------
Consuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous.
Strict validation of user supplied methods and parameters should be performed
as well as having a strong [ImageMagick security
policy](https://imagemagick.org/script/security-policy.php) deployed.
Credits
-------
Thank you [lio346](https://hackerone.com/lio346) for reporting this!
Active Storage attempts to prevent the use of potentially unsafe image
transformation methods and parameters by default.
The default allowed list contains three methods allow for the circumvention
of the safe defaults which enables potential command injection
vulnerabilities in cases where arbitrary user supplied input is accepted as
valid transformation methods or parameters.
Impact
------
This vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor.
Vulnerable code will look something similar to this:
```
<%= image_tag blob.variant(params[:t] => params[:v]) %>
```
Where the transformation method or its arguments are untrusted arbitrary input.
All users running an affected release should either upgrade or use one of the workarounds immediately.
Workarounds
-----------
Consuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous.
Strict validation of user supplied methods and parameters should be performed
as well as having a strong [ImageMagick security
policy](https://imagemagick.org/script/security-policy.php) deployed.
Credits
-------
Thank you [lio346](https://hackerone.com/lio346) for reporting this!
Metrics
Affected Vendors & Products
No data.
No data.
No data.
No data.
Advisories
| Source | ID | Title |
|---|---|---|
 Debian DLA |
DLA-4416-1 | rails security update |
 Debian DSA |
DSA-6090-1 | rails security update |
 EUVD |
EUVD-2025-29509 | Active Storage allowed transformation methods that were potentially unsafe |
 Github GHSA |
GHSA-r4mg-4433-c7g3 | Active Storage allowed transformation methods that were potentially unsafe |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
| Link | Providers |
|---|---|
| https://github.com/advisories/GHSA-r4mg-4433-c7g3 |
|
History
Fri, 30 Jan 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | # Active Storage allowed transformation methods potentially unsafe Active Storage attempts to prevent the use of potentially unsafe image transformation methods and parameters by default. The default allowed list contains three methods allow for the circumvention of the safe defaults which enables potential command injection vulnerabilities in cases where arbitrary user supplied input is accepted as valid transformation methods or parameters. Impact ------ This vulnerability impacts applications that use Active Storage with the image_processing processing gem in addition to mini_magick as the image processor. Vulnerable code will look something similar to this: ``` <%= image_tag blob.variant(params[:t] => params[:v]) %> ``` Where the transformation method or its arguments are untrusted arbitrary input. All users running an affected release should either upgrade or use one of the workarounds immediately. Workarounds ----------- Consuming user supplied input for image transformation methods or their parameters is unsupported behavior and should be considered dangerous. Strict validation of user supplied methods and parameters should be performed as well as having a strong [ImageMagick security policy](https://imagemagick.org/script/security-policy.php) deployed. Credits ------- Thank you [lio346](https://hackerone.com/lio346) for reporting this! | |
| References |
| |
| Metrics |
cvssV4_0
|
Projects
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MITRE
Status: PUBLISHED
Assigner: hackerone
Published:
Updated: 2026-01-30T20:11:15.219Z
Reserved: 2025-01-17T01:00:07.458Z
Link: CVE-2025-24293
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-01-30T21:15:55.677
Modified: 2026-01-30T21:15:55.677
Link: CVE-2025-24293
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.