GHSA-P73G-29F3-M84X

Vulnerability from github – Published: 2026-09-02 15:34 – Updated: 2026-09-02 15:34
VLAI
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.

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
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{
  "affected": [],
  "aliases": [
    "CVE-2026-79991"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-89"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-02T15:17:42Z",
    "severity": "HIGH"
  },
  "details": "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": "GHSA-p73g-29f3-m84x",
  "modified": "2026-09-02T15:34:50Z",
  "published": "2026-09-02T15:34:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-4mgp-5vf2-7c9m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79991"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.10.13"
    },
    {
      "type": "WEB",
      "url": "https://www.hckrt.com/hacktivity/HCKRT-B5BSMM"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}



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