Vulnerability in Esri Portal for ArcGIS

[ Description ]Official description

A flaw in Portal for ArcGIS allows unauthenticated users to create new accounts through the sharing endpoint even when self-service account registration is disabled (disableSignup=true). An attacker can bypass the intended restriction by manipulating the signup workflow, resulting in unauthorized account creation.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund27 Sep 2026WID-SEC-2026-3601

  ESRI ArcGIS: Multiple vulnerabilities allow an unspecified attack Translated from German

  CVE-2026-10759CVE-2026-69226CVE-2026-69227

[ References ]References

• www.esri.com/arcgis-blog/products/trust-arcgis/administration/september-2026-arcgis-sec…