{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72701", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-10T13:02:20.829Z", "datePublished": "2026-08-25T01:30:23.965Z", "dateUpdated": "2026-08-25T01:30:23.965Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-25T01:30:23.965Z"}, "datePublic": "2026-08-10T00:00:00.000Z", "title": "Grav CMS before 2.0.16 Timing Attack via verifyNonce", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Observable Timing Discrepancy", "cweId": "CWE-208", "type": "CWE"}]}], "affected": [{"vendor": "getgrav", "product": "grav", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "2.0.16"}, {"version": "2.0.16", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.0.16"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW"}}], "references": [{"url": "https://github.com/getgrav/grav/security/advisories/GHSA-38p6-h87p-r4cg", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-38p6-h87p-r4cg)"}, {"name": "VulnCheck Advisory: Grav CMS before 2.0.16 Timing Attack via verifyNonce", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/grav-cms-before-timing-attack-via-verifynonce"}], "credits": [{"lang": "en", "value": "alham-rizvi", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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