# CVE-2026-72702

## Summary

- **CVE ID:** CVE-2026-72702
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-346
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 28, 2026

## 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.

## Affected Products

- getgrav — grav (0)
- getgrav — grav (2.0.16)

## References

- [CNA](https://github.com/getgrav/grav/security/advisories/GHSA-9ccq-2jfg-qw33)
- [CNA](https://www.vulncheck.com/advisories/grav-cms-before-origin-validation-bypass-via-referer)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 1.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._