CVE-2026-63407

HIGH 8.2

Grav API Plugin: CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses

CVSS Score

8.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-942
Vendor	getgrav
Product	grav-plugin-api
Published	Aug 19, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

getgrav / grav-plugin-api

< 1.0.0-rc.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2 github.com: https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9 github.com: https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16