getgrav Grav up to 2.0.15 Origin Validation referrerRoute referrer predictable value

Summaryinfo

A vulnerability, which was classified as critical, was found in getgrav Grav up to 2.0.15. This vulnerability affects the function Uri::referrer/Pages::referrerRoute of the component Origin Validation. The manipulation of the argument referrer results in predictable value. This vulnerability is cataloged as CVE-2026-72702. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in getgrav Grav up to 2.0.15. Affected is the function Uri::referrer/Pages::referrerRoute of the component Origin Validation. The manipulation of the argument referrer with an unknown input leads to a predictable value vulnerability. CWE is classifying the issue as CWE-342. An exact value or random number can be precisely predicted by observing previous values. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-72702 since 08/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

Upgrading to version 2.0.16 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• getgrav

Name

• Grav

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10
• 2.0.11
• 2.0.12
• 2.0.13
• 2.0.14
• 2.0.15

Website

• Product: https://github.com/getgrav/grav/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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