Arbitrary File Upload Affecting getgrav/grav package, versions >=0.0.0
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-GETGRAVGRAV-16624488
- published10 May 2026
- disclosed6 May 2026
- credit0d000721999
Introduced: 6 May 2026
NewCVE-2026-42844 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS.
Affected versions of this package are vulnerable to Arbitrary File Upload via the blueprint-upload process. An attacker can gain full administrative access by uploading a crafted YAML file to the user/accounts/ directory, resulting in the creation of a new super-admin account. This is possible because the upload handler accepts user-controlled destination and scope parameters, allowing arbitrary files to be written to sensitive locations.