CVE-2026-63408: Getgrav Grav-Plugin-API

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Getgrav Grav-Plugin-API: before 1.0.0-rc.16 (fixed in 1.0.0-rc.16)

Published 2026-08-19. Last modified 2026-09-09.