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Vulnerabilities CVE-2026-57852

CVE-2026-57852

Medium
Open
TLP:CLEAR

Authentication Bypass via Null Short-Circuit in Grav CMS Scheduler Webhook Token Check

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Description

Grav CMS scheduler-webhook plugin contains an authentication bypass vulnerability that allows unauthenticated remote attackers to trigger configured scheduled jobs by exploiting a short-circuit logic flaw in the webhook token validation. Attackers can send a single unauthenticated POST request to the scheduler webhook endpoint to execute all configured scheduled jobs or target a specific job, causing unintended execution of operator-defined commands under the web server process user.

Details

CVSS Score
5.6
EPSS Score
0.42%

35.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Confidence
90%
Published
Jul 20, 2026
Last Modified
Jul 20, 2026
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