GHSA-P73G-29F3-M84X
Vulnerability from github – Published: 2026-09-02 15:34 – Updated: 2026-09-02 15:34Craft CMS GraphQL entry mutation resolvers (saveEntry, deleteEntry) read siteIddirectly from$argumentswithout passing throughArgumentManagerprepareArguments(), which is the function that enforces site-scope filtering via array_intersect against the GraphQL schema’s allowed sites. The query path (ElementResolverprepareElementQuery) correctly calls prepareArguments()`, so queries to unauthorized sites return empty. But mutations bypass this entirely — an attacker with a token scoped to Site A can create, modify, or delete entries in Site B by passing siteId in the mutations argument.
{
"affected": [],
"aliases": [
"CVE-2026-79991"
],
"database_specific": {
"cwe_ids": [
"CWE-89"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-02T15:17:42Z",
"severity": "HIGH"
},
"details": "Craft CMS GraphQL entry mutation resolvers (saveEntry,\u00a0deleteEntry) read\u00a0siteIddirectly from$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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