Missing Authorization Affecting getkirby/cms package, versions >=5.0.0, <5.5.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-GETKIRBYCMS-20186853
- published28 Sept 2026
- disclosed31 Aug 2026
- creditUnknown
Introduced: 31 Aug 2026
CVE-2026-71415 (opens in a new tab)How to fix?
Upgrade getkirby/cms to version 5.5.2 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization via the chunk upload handler process. An attacker can consume excessive server storage by uploading multiple large incomplete file chunks without proper permissions, potentially leading to denial of service for legitimate users by exhausting available temporary storage space. This is only exploitable if authenticated users have access to the REST API (access.panel permission enabled) but lack all file upload permissions (files.create, files.replace, and user/users.update permissions are disabled).