CVE-2026-69237

Received Received - Intake

HTML Injection in Esri Portal for ArcGIS

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: Environmental Systems Research Institute, Inc.

Description

There is an HTML injection vulnerability in Esri Portal for ArcGIS versions 11.3 and prior that allows a remote attacker with administrative privileges to insert arbitrary HTML into an administrative API. Users working with ArcGIS Enterprise 11.1, and 11.3 are encouraged to patch. All users are advised to upgrade to the latest long-term support release.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-21

Last Modified

2026-08-21

Generated

2026-08-22

AI Q&A

2026-08-22

EPSS Evaluated

N/A

NVD

CVE-2026-69237

EUVD

EUVD-2026-64085

Affected Vendors & Products

Vendor	Product	Version / Range
esri	portal_for_arcgis	to 11.4 (exc)
esri	arcgis_enterprise	to 11.1 (inc)
esri	arcgis_enterprise	to 11.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This vulnerability is an HTML injection flaw in Esri Portal for ArcGIS versions 11.3 and earlier. It allows a remote attacker with admin privileges to inject arbitrary HTML into an administrative API endpoint.

Detection Guidance

This vulnerability requires administrative privileges to exploit, so detection should focus on monitoring administrative API interactions for unexpected HTML content insertion. Check server logs for unusual administrative API requests or responses containing HTML tags. Review ArcGIS Enterprise configurations for unauthorized modifications to administrative settings.

Impact Analysis

An attacker could manipulate administrative interfaces or steal session data. Users of ArcGIS Enterprise 11.1 and 11.3 should patch immediately as they are specifically affected.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized HTML injection through administrative APIs. Such an attack might lead to data breaches or unauthorized access, which are key concerns under these regulations.

Mitigation Strategies

Upgrade to the latest long-term support release of ArcGIS Enterprise. Specifically, users of versions 11.1 and 11.3 should apply patches immediately as recommended by Esri.

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