There is an HTML injection vulnerability in Esri Portal for ArcGIS versions 11.5 and prior that allows a remote, highly priviliged attacker to insert arbitrary HTML into the Portal for ArcGIS Home application. Users working with ArcGIS Enterprise 11.1, 11.3, and 11.5 are encouraged to patch. All users are advised to upgrade to the latest long-term support release.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/august-2026-arcgis-security-bulletin Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 4.8 · esriNVD modified 2026-10-12 16:10
Affected (CPE criteria) 18
cpe:2.3:a:esri:portal_for_arcgis:*:*:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:-:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2024_update1:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2024_update2:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2025_update1:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2025_update2:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2025_update3:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.1:security_2026_update2:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.2:*:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.3:-:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.3:security_2025_update1:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.3:security_2025_update2:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.3:security_2025_update3:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.3:security_2026_update2:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.4:*:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.5:-:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.5:security_2026_update1:*:*:*:*:*:*cpe:2.3:a:esri:portal_for_arcgis:11.5:security_2026_update2:*:*:*:*:*:*