CVE-2026-58656

High

Description

Grav API plugin before v1.0.0-rc.16 accepts JWT tokens via the ?token= URL query parameter and responds with Access-Control-Allow-Origin: *, allowing unauthenticated attackers to make fully authenticated cross-origin API requests from any malicious website. Attackers who obtain a leaked JWT token from access logs, proxy logs, browser history, or Referrer headers can create persistent backdoor super-admin accounts and exfiltrate sensitive configuration and user data.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Grav

PublishedJul 8, 2026

First seenJul 8, 2026

Weakness typeCWE-598CWE-598

How to fix

Vendor advisories

github.com/getgrav/grav/security/advisories/GHSA-hqm9-5xxw-4qxp

Affected products

Product	Affected versions	Fixed in
getgrav grav	v ≤ 1.0.0-rc.15	—

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