---
id: CVE-2026-50096
title: BUG-000187164 - ArcGIS Server has a security vulnerability.
summary: >-
  There is a reflected cross site scripting vulnerability in Esri Portal for
  ArcGIS versions 12.1 and prior which may allow a remote, unauthenticated
  attacker to create a crafted link which when clicked could potentially execute
  arbitrary …
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: Esri
product: ArcGIS Server
affected:
  - arcgis_server >= 11.1 < 12.1
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-26T18:54:12.100332Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T19:38:28.569Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-50096'
references:
  - url: >-
      https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/october-2026-arcgis-security-bulletin
tags:
  - cve.org
ingestedAt: '2026-10-26T18:35:51.487Z'
epss: 0.00251
epssPercentile: 0.1651
---

## Overview

There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS versions 12.1 and prior which may allow a remote, unauthenticated attacker to create a crafted link which when clicked could potentially execute arbitrary JavaScript code in the victim’s browser. A patch is provided for ArcGIS Server software in General Availability and Extended support status, which includes versions 12.1, 12.0, 11.5, 11.3, and 11.1. Other versions are in mature or retired status, which are not patch eligible. Users working with unlisted versions are advised to upgrade and apply the patch.

## Affected

- `arcgis_server >= 11.1 < 12.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.