CVE-2026-69227 Portal for ArcGIS - Authentication Bypass

Portal for ArcGIS contains an authentication bypass caused by unauthenticated access to certain /portaladmin/local API endpoints, letting unauthenticated attackers access administrative functionality, exploit requires specific conditions.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.33% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-306

Vendor fix

Update to the latest version of Portal for ArcGIS.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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