Vulnerability in Getgrav Grav-Plugin-Api
CVE-2026-63407
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.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
Affected products
- Getgrav Grav-plugin-api — versions < 1.0.0-rc.16
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-63407?
- CVE-2026-63407 is a high-severity vulnerability in Getgrav Grav-Plugin-Api, classified under Permissive Cross-domain Policy with Untrusted Domains. CVSS score: 8.2/10. Published 2026-08-19.
- How severe is CVE-2026-63407?
- High severity. CVSS v3 base score is 8.2 out of 10.