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.
{
"cwe_ids": [
"CWE-303"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57852.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "1.1.3"
},
{
"last_affected": "2.0.8"
}
],
"source": "AFFECTED_FIELD"
}