Incorrect Implementation of Authentication Algorithm Affecting getgrav/grav package, versions <2.0.9
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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Test your applications- Snyk IDSNYK-PHP-GETGRAVGRAV-18306783
- published25 Jul 2026
- disclosed20 Jul 2026
- creditUnknown
Introduced: 20 Jul 2026
NewCVE-2026-57852 (opens in a new tab)How to fix?
Upgrade getgrav/grav to version 2.0.9 or higher.
Overview
getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS.
Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm via the webhook token validation process. An attacker can execute arbitrary scheduled jobs by sending a specially crafted unauthenticated POST request to the scheduler webhook endpoint.