Authorization Bypass Through User-Controlled Key Affecting craftcms/cms package, versions >=4.0.0-RC1, <4.17.14>=5.0.0-RC1, <5.9.21


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.27% (18th percentile)

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  • Snyk IDSNYK-PHP-CRAFTCMSCMS-17798829
  • published2 Jul 2026
  • disclosed2 Jul 2026
  • creditUnknown

Introduced: 2 Jul 2026

NewCVE-2026-50283  (opens in a new tab)
CWE-639  (opens in a new tab)

How to fix?

Upgrade craftcms/cms to version 4.17.14, 5.9.21 or higher.

Overview

craftcms/cms is a content management system.

Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the actionReplaceFile process. An attacker can delete assets in unauthorized volumes by supplying both assetId and sourceAssetId without having delete permissions for the source asset.

CVSS Base Scores

version 4.0
version 3.1