CVE-2026-50096: Esri ArcGIS Server · Cross-site Scripting
Affects Esri ArcGIS ServerSource CVE Database V5
Not known to be exploited · CVSS 6.1 Medium : upgrade to 12.1 when convenient.
Data as of 26 Oct 2026, 19:57 UTC
- Patch
- Available – fixed in 12.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 26 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Esri ArcGIS Server to 12.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| EsriArcGIS Server | Affected
| Fixed in
|
AI-suggested
A patch is available in Esri ArcGIS Server version 12.1 and later. Users running affected versions (>=11.1 and <12.1) should upgrade to version 12.1 or later to remediate this vulnerability. Versions in mature or retired status are not patch eligible; users should consider upgrading to a supported version. No other specific mitigations are indicated by the vendor advisory.
Description
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.