{"id":"GHSA-qh7h-6c7g-x8m6","title":"Duplicate Advisory: Grav: Origin validation bypass in Uri::referrer() and Pages::referrerRoute() via unanchored prefix match","summary":"Duplicate Advisory: Grav: Origin validation bypass in Uri::referrer() and Pages::referrerRoute() via unanchored prefix match","severity":"critical","cvss":5.4,"cwe":["CWE-346"],"vendor":"getgrav","product":"getgrav/grav","ecosystem":"composer","affected":["getgrav/grav < 2.0.16"],"published":"2026-08-25","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:24:27Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-qh7h-6c7g-x8m6","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-9ccq-2jfg-qw33"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72702"},{"url":"https://www.vulncheck.com/advisories/grav-cms-before-origin-validation-bypass-via-referer"},{"url":"https://github.com/advisories/GHSA-qh7h-6c7g-x8m6"}],"tags":["ghsa","composer"],"ingestedAt":"2026-09-17T20:28:02.780Z","slug":"GHSA-qh7h-6c7g-x8m6","body":"## Overview\n\n### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-9ccq-2jfg-qw33. This link is maintained to preserve external references.\n\n### Original Description\nGrav CMS before 2.0.16 contains an origin validation bypass in the Uri::referrer() and Pages::referrerRoute() methods, which validate the Referer header using an unanchored string prefix match (str_starts_with($referrer, $base)) with no trailing delimiter. An attacker who controls a domain that begins with the victim site's origin (e.g. https://example.com.attacker.tld) can send a request with such a Referer to be treated as same-origin, bypassing the Referer-based origin check.\n\n## Affected packages\n\n- `getgrav/grav < 2.0.16`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"midnight","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}