DRUPAL-CONTRIB-2026-337

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Import Source
https://github.com/DrupalSecurityTeam/drupal-advisory-database/blob/main/advisories/s3fs_cors/DRUPAL-CONTRIB-2026-337.json
JSON Data
https://api.osv.dev/v1/vulns/DRUPAL-CONTRIB-2026-337
Aliases
  • CVE-2026-126746
Published
2026-11-11T18:06:21Z
Modified
2026-11-11T18:45:03Z
Summary
[none]
Details

The S3 File System CORS Upload module lets users upload files straight from the browser to Amazon S3 (or an S3-compatible service), using a file widget on entity forms.

The module doesn't sufficiently restrict the upload permission it gives the browser. A user who can upload through the widget can overwrite other files already stored in the bucket, including files they couldn't otherwise replace.

This vulnerability is mitigated by the fact that an attacker must have access to a form that uses the S3 File System CORS Upload widget.

References
Credits

Affected packages

Packagist:https://packages.drupal.org/8 / drupal/s3fs_cors

Package

Name
drupal/s3fs_cors
Purl
pkg:composer/drupal/s3fs_cors?repository_url=https:%2F%2Fpackages.drupal.org%2F8

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.4.0
Database specific
Show details 
{
    "constraint": "<1.4.0"
}

Database specific

affected_versions 
"<1.4.0"
source 
"https://github.com/DrupalSecurityTeam/drupal-advisory-database/blob/main/advisories/s3fs_cors/DRUPAL-CONTRIB-2026-337.json"