Vulnerability Description
Grav CMS before 2.0.16 contains a timing vulnerability in Utils::verifyNonce() that uses non-constant-time string comparison with the === operator instead of hash_equals() for CSRF nonce validation. Attackers can measure response timing differences to recover valid nonce values byte-by-byte through multiple requests, weakening CSRF protection below its intended security margin.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav/security/advisories/GHSA-38p6-h87p-r4cg
- https://www.vulncheck.com/advisories/grav-cms-before-timing-attack-via-verifynon
- https://github.com/getgrav/grav/security/advisories/GHSA-38p6-h87p-r4cg
FAQ
What is CVE-2026-72701?
CVE-2026-72701 is a vulnerability with a CVSS score of 3.7 (LOW). Grav CMS before 2.0.16 contains a timing vulnerability in Utils::verifyNonce() that uses non-constant-time string comparison with the === operator instead of hash_equals() for CSRF nonce validation. A...
How severe is CVE-2026-72701?
CVE-2026-72701 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-72701?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.