---
id: "CVE-2026-50096"
kind: "vulnerability"
aliases: ["CVE-2026-50096"]
title: "Esri Portal for ArcGIS: reflected XSS via crafted link runs script"
severity: "medium"
cvss: 6.1
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["arcgis", "esri", "gis", "portal-for-arcgis", "vendor"]
not_affected_if: []
published_at: "2026-10-26T18:17:48+00:00"
first_seen_at: "2026-10-26T18:31:44+00:00"
updated_at: "2026-10-26T18:34:10+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50096", "first_seen_at": "2026-10-26T18:31:44+00:00"}]
---

# Esri Portal for ArcGIS: reflected XSS via crafted link runs script

Esri Portal for ArcGIS 12.1 and earlier has a reflected cross-site scripting flaw. An unauthenticated attacker who gets a victim to click a crafted link can run arbitrary JavaScript in the victim's browser.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Portal for ArcGIS version against the affected range (12.1 and prior)
- unknown for other checks

## Fix

- Apply the Esri patch for Portal for ArcGIS, available for the General Availability and Extended support releases listed in the source (12.1, 12.0, 11.5, 11.3, 11.1)
- Upgrade unlisted versions to a supported release and apply the patch
- Versions in mature or retired status are not patch eligible, so upgrade them

## Timeline

- 2026-10-26T18:31:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-50096

## From the sources

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.

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