CVE-2026-57852— Authentication Bypass via Null Short-Circuit in Grav CMS Scheduler Webhook Token Check
Possible ATT&CK Techniques 3AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application T1505 · Server Software ComponentGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-57852
Vulnerability Information
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Vulnerability Title
Authentication Bypass via Null Short-Circuit in Grav CMS Scheduler Webhook Token Check
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证算法的不正确实现
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Trilby Media | Grav CMS scheduler-webhook plugin | 0 ~ 1.1.3 | - |
II. Public POCs for CVE-2026-57852
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Vendor Advisories for CVE-2026-57852 (2)
IV. Related Vulnerabilities
Same weakness: CWE-303
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Windows SMB Server Elevation of Privilege Vulnerability - CVE-2026-41053
Over-inclusive team membership expansion in GitHub App authe - CVE-2026-8922
Org.keycloak/keycloak-services: keycloak: org.keycloak.proto - CVE-2026-41103
Microsoft SSO Plugin for Jira & Confluence Elevation of Priv
V. Comments for CVE-2026-57852
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