Vulnerability in Getgrav Grav-Plugin-Api
CVE-2026-63408
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 v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-2026-63408?
- CVE-2026-63408 is a high-severity vulnerability in Getgrav Grav-Plugin-Api, classified under CWE-598. CVSS score: 7.5/10. Published 2026-08-19.
- How severe is CVE-2026-63408?
- High severity. CVSS v3 base score is 7.5 out of 10.