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CVE-2026-18426 Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit

🗓️ 15 Sep 2026 20:16:12Reported by ConcreteCMSType 
cvelist
 cvelist
🔗 www.cve.org👁 10 Views

Missing authorization in Concrete CMS 9.0.0-9.5.2 Express Form block lets editors alter other forms.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-18426
15 Sep 202620:16
cve
euvd
EUVD
EUVD-2026-79942
15 Sep 202620:16
euvd
nvd
NVD
CVE-2026-18426
15 Sep 202621:16
nvd
[
  {
    "vendor": "Concrete CMS",
    "product": "Concrete CMS",
    "collectionURL": "https://github.com/concretecms/concretecms",
    "repo": "https://github.com/concretecms/concretecms",
    "versions": [
      {
        "status": "affected",
        "version": "9.0.0",
        "lessThanOrEqual": "9.5.2",
        "versionType": "git"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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