Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin can submit an attacker-obtained JWT through the Authorization or X-API-Token header, read the authenticated response, and perform write operations with the token owner's privileges, enabling data exfiltration and account modification. This issue is fixed in version 1.0.0-rc.16.
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History

Wed, 19 Aug 2026 16:00:00 +0000

Type Values Removed Values Added
Description Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin can submit an attacker-obtained JWT through the Authorization or X-API-Token header, read the authenticated response, and perform write operations with the token owner's privileges, enabling data exfiltration and account modification. This issue is fixed in version 1.0.0-rc.16.
Title Grav API Plugin: CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses
Weaknesses CWE-942
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-19T15:51:36.784Z

Reserved: 2026-07-16T19:20:28.987Z

Link: CVE-2026-63407

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-19T16:18:37.863

Modified: 2026-08-19T16:18:37.863

Link: CVE-2026-63407

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses