There is an information disclosure vulnerability in Esri Portal for ArcGIS versions 11.5 through 12.0 and earlier that may allow a remote, unauthenticated attacker to reflect sensitive information in a http response body.
https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/august-2026-arcgis-security-bulletin
Source: Mitre, NVD
Published: 2026-08-21
Updated: 2026-08-21
Base Score: 5.4
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N
Severity: Medium
Base Score: 5.9
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.00331