FKIE_CVE-2026-79991

Vulnerability from fkie_nvd - Published: 2026-09-02 15:17 - Updated: 2026-09-02 15:17
Severity
7.1 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N
Summary
Craft CMS GraphQL entry mutation resolvers (saveEntry, deleteEntry) read siteIddirectly from$argumentswithout passing throughArgumentManagerprepareArguments(), which is the function that enforces site-scope filtering via array_intersect against the GraphQL schema’s allowed sites. The query path (ElementResolverprepareElementQuery) correctly calls prepareArguments()`, so queries to unauthorized sites return empty. But mutations bypass this entirely — 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.
References
7004884b-51e2-48e8-b4a2-5ca29e80453ehttps://github.com/craftcms/cms
7004884b-51e2-48e8-b4a2-5ca29e80453ehttps://github.com/craftcms/cms/releases/tag/5.10.13
7004884b-51e2-48e8-b4a2-5ca29e80453ehttps://github.com/craftcms/cms/security/advisories/GHSA-4mgp-5vf2-7c9m
7004884b-51e2-48e8-b4a2-5ca29e80453ehttps://www.hckrt.com/hacktivity/HCKRT-B5BSMM
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://packagist.org",
          "defaultStatus": "unaffected",
          "packageName": "craftcms/cms",
          "product": "cms",
          "vendor": "craftcms",
          "versions": [
            {
              "lessThan": "5.10.13",
              "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-2026-79991",
  "lastModified": "2026-09-02T15:17:42.673",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.1,
          "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:N/VA:L/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": "LOW",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-02T15:17:42.673",
  "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/5.10.13"
    },
    {
      "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-4mgp-5vf2-7c9m"
    },
    {
      "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
      "url": "https://www.hckrt.com/hacktivity/HCKRT-B5BSMM"
    }
  ],
  "sourceIdentifier": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ],
      "source": "7004884b-51e2-48e8-b4a2-5ca29e80453e",
      "type": "Secondary"
    }
  ]
}



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