{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-79990", "assignerOrgId": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "state": "PUBLISHED", "assignerShortName": "Hackrate", "dateReserved": "2026-08-25T16:39:03.171Z", "datePublished": "2026-09-02T14:19:54.892Z", "dateUpdated": "2026-09-02T17:53:23.468Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "shortName": "Hackrate", "dateUpdated": "2026-09-02T14:19:54.892Z"}, "title": "GQL entry mutation `siteId` bypasses schema site scope, enabling cross-site content read/write/delete", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-639", "description": "CWE-639 Authorization bypass through User-Controlled key", "type": "CWE"}]}], "affected": [{"vendor": "craftcms", "product": "cms", "collectionURL": "https://packagist.org", "packageName": "craftcms/cms", "versions": [{"status": "affected", "version": "5.0.0-RC1", "lessThan": "5.10.11", "versionType": "semver"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:craftcms:cms:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0.0-rc1", "versionEndExcluding": "5.10.11"}]}]}], "descriptions": [{"lang": "en", "value": "Craft CMS GraphQL entry mutation resolvers (saveEntry,\u00a0deleteEntry) read\u00a0siteIddirectly from$argumentswithout passing throughArgumentManagerprepareArguments(), which is the function that enforces site-scope filtering via\u00a0array_intersect\u00a0against the GraphQL schema\u2019s allowed sites. The query path (ElementResolverprepareElementQuery) correctly calls\u00a0prepareArguments()`, so queries to unauthorized sites return empty. But mutations bypass this entirely \u2014 an attacker with a token scoped to Site A can create, modify, or delete entries in Site B by passing siteId in the mutations argument.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Craft CMS GraphQL entry mutation resolvers (<code>saveEntry</code>,&nbsp;<code>deleteEntry) read&nbsp;</code>siteId<code>directly from</code>$arguments<code>without passing through</code>ArgumentManagerprepareArguments()<code>, which is the function that enforces site-scope filtering via&nbsp;</code>array_intersect<code>&nbsp;against the GraphQL schema\u2019s allowed sites. The query path (</code>ElementResolverprepareElementQuery<code>) correctly calls&nbsp;</code>prepareArguments()`, so queries to unauthorized sites return empty. But mutations bypass this entirely \u2014 an attacker with a token scoped to Site A can create, modify, or delete entries in Site B by passing siteId in the mutations argument.<br>"}]}], "references": [{"url": "https://www.hckrt.com/hacktivity/HCKRT-XEQKMX", "tags": ["third-party-advisory", "technical-description", "mitigation"]}, {"url": "https://github.com/craftcms/cms/releases/tag/5.10.11", "tags": ["release-notes"]}, {"url": "https://github.com/craftcms/cms", "tags": ["product"]}, {"url": "https://github.com/craftcms/cms/security/advisories/GHSA-3wcr-p33w-528f", "tags": ["third-party-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.7, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "@ddme", "type": "reporter"}, {"lang": "en", "value": "Hackrate", "type": "coordinator"}], "source": {"advisory": "GHSA-3wcr-p33w-528f", "discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-02T17:52:53.038505Z", "id": "CVE-2026-79990", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-02T17:53:23.468Z"}}]}}

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{"affected": [{"affectedData": [{"collectionURL": "https://packagist.org", "defaultStatus": "unaffected", "packageName": "craftcms/cms", "product": "cms", "vendor": "craftcms", "versions": [{"lessThan": "5.10.11", "status": "affected", "version": "5.0.0-RC1", "versionType": "semver"}]}], "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Craft CMS GraphQL entry mutation resolvers (saveEntry,\u00a0deleteEntry) read\u00a0siteIddirectly from$argumentswithout passing throughArgumentManagerprepareArguments(), which is the function that enforces site-scope filtering via\u00a0array_intersect\u00a0against the GraphQL schema\u2019s allowed sites. The query path (ElementResolverprepareElementQuery) correctly calls\u00a0prepareArguments()`, so queries to unauthorized sites return empty. But mutations bypass this entirely \u2014 an attacker with a token scoped to Site A can create, modify, or delete entries in Site B by passing siteId in the mutations argument."}], "id": "CVE-2026-79990", "lastModified": "2026-09-02T18:21:25.867", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-79990", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-02T17:52:53.038505Z", "version": "2.0.3"}}]}, "published": "2026-09-02T15:17:42.473", "references": [{"source": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "url": "https://github.com/craftcms/cms"}, {"source": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "url": "https://github.com/craftcms/cms/releases/tag/5.10.11"}, {"source": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "url": "https://github.com/craftcms/cms/security/advisories/GHSA-3wcr-p33w-528f"}, {"source": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "url": "https://www.hckrt.com/hacktivity/HCKRT-XEQKMX"}], "sourceIdentifier": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e", "type": "Secondary"}]}

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