Vulnerability 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 JwtAuthenticator::extractBearerToken() accepts a JWT from the token URL query parameter on every /api/v1 route, including state-changing endpoints. Request URLs consequently expose valid access tokens through Apache, proxy, and CDN logs, browser history, and Referer headers, allowing a party with access to those records to reuse the token with the owner's API privileges. This issue is fixed in version 1.0.0-rc.16.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20
- https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16
- https://github.com/getgrav/grav/security/advisories/GHSA-4hpj-wmpw-ghwq
FAQ
What is CVE-2026-63408?
CVE-2026-63408 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 JwtAuthenticator::extractBearerToken() accepts a JWT...
How severe is CVE-2026-63408?
CVE-2026-63408 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-63408?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.