# CVE-2026-72701

## Summary

- **CVE ID:** CVE-2026-72701
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-208
- **Published:** Aug 25, 2026
- **Last Modified:** Aug 27, 2026

## 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.

## Affected Products

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

## References

- [CNA](https://github.com/getgrav/grav/security/advisories/GHSA-38p6-h87p-r4cg)
- [CNA](https://www.vulncheck.com/advisories/grav-cms-before-timing-attack-via-verifynonce)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._