Is CVE-2026-63408 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-63408?

CVE-2026-63408 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-63408

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.