CVE-2026-62387
The Grav API plugin (getgrav/grav-plugin-api) before 1.0.0-rc.16 shipped Access-Control-Allow-Origin: * as its default CORS configuration on all responses, including authenticated endpoints and preflight (OPTIONS) responses. Because the plugin accepts credentials via the Authorization and X-API-Token headers (set programmatically by JavaScript rather than via cookies), an attacker who obtains a valid access token (e.g., via log leakage, Referer headers, browser history, or network capture) can issue fully authenticated cross-origin requests from any malicious website to read sensitive data and perform write operations as the token's user. Fixed in 1.0.0-rc.16.
- Score
- CVSS 4.0 7.1 High
- Status
- Deferred - disclosure@vulncheck.com
- Published
- 2026-07-17
- Last modified
- 2026-10-24
- Weaknesses
- CWE-942
Affected products
References
- https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2
- https://www.vulncheck.com/advisories/grav-rc-16-cors-misconfiguration-via-api-plugin
