{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.0.0-RC1"
              },
              {
                "fixed": "5.10.11"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "04755d93f86d07cc183db47db8a0eee106892e30"
            },
            {
              "fixed": "9dece66d9d35f9f2615f5f2107c98d2334c71cfc"
            }
          ],
          "repo": "https://github.com/craftcms/cms",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3wcr-p33w-528f"
  ],
  "database_specific": {
    "cna_assigner": "Hackrate",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79990.json"
  },
  "details": "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.",
  "id": "CVE-2026-79990",
  "modified": "2026-09-04T03:30:39.080222136Z",
  "published": "2026-09-02T14:19:54.892Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://packagist.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79990.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/craftcms/cms/releases/tag/5.10.11"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-3wcr-p33w-528f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79990"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.hckrt.com/hacktivity/HCKRT-XEQKMX"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "GQL entry mutation `siteId` bypasses schema site scope, enabling cross-site content read/write/delete"
}