{"id":"CVE-2026-72701","revision":"f73bf574698c427ba61d3bdcd5c86b23","records":[{"revision":"f73bf574698c427ba61d3bdcd5c86b23","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72701","aliases":[],"title":"Grav CMS before 2.0.16 Timing Attack via verifyNonce","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.","state":0,"publishedAt":"2026-08-25T01:30:23.965+00:00","modifiedAt":"2026-10-08T15:24:24.438+00:00","affected":[{"ecosystem":"Vendor product","name":"grav","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"getgrav\",\n                    \"product\": \"grav\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.0.16\"\n                        },\n                        {\n                            \"version\": \"2.0.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:composer/getgrav/grav\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":"LOW"}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-38p6-h87p-r4cg","https://www.vulncheck.com/advisories/grav-cms-before-timing-attack-via-verifynonce"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72701","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72701","identifiers":["CVE-2026-72701"]},"retained":false,"historicalAffected":[]}],"coverage":[]}