Grav 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, $base)) with no trailing delimiter. An attacker who controls a domain that begins with the victim site's origin (e.g. https://example.com.attacker.tld) can send a request with such a Referer to be treated as same-origin, bypassing the Referer-based origin check.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 25 Aug 2026 02:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Grav CMS before 2.0.16 contains an origin validation bypass in the Uri::referrer() and Pages::referrerRoute() methods, which validate the Referer header using an unanchored string prefix match (str_starts_with($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. | |
| Title | Grav CMS before 2.0.16 Origin Validation Bypass via Referer | |
| First Time appeared |
Getgrav
Getgrav grav |
|
| Weaknesses | CWE-346 | |
| CPEs | cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Getgrav
Getgrav grav |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-25T01:30:25.032Z
Reserved: 2026-08-10T13:02:20.829Z
Link: CVE-2026-72702
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-25T02:16:46.120
Modified: 2026-08-25T02:16:46.120
Link: CVE-2026-72702
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses