{"id":"CVE-2026-63407","title":"Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content","summary":"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 CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N","cwe":["CWE-942"],"published":"2026-08-19","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:13:25.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63407","references":[{"url":"https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9","label":"security-advisories@github.com"},{"url":"https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16","label":"security-advisories@github.com"},{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2","label":"security-advisories@github.com"},{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00271,"epssPercentile":0.19515,"ingestedAt":"2026-09-09T21:22:45.540Z","slug":"CVE-2026-63407","body":"## Overview\n\nGrav 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 CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin can submit an attacker-obtained JWT through the Authorization or X-API-Token header, read the authenticated response, and perform write operations with the token owner's privileges, enabling data exfiltration and account modification. This issue is fixed in version 1.0.0-rc.16.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}