CVE-2026-33520 BUG-000185167 - ArcGIS Server has a security vulnerability.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-33520?
CVE-2026-33520 is a medium-severity vulnerability in Esri ArcGIS Server, published on 26 Oct 2026.
Official 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 impacted ArcGIS Server software in General Availability and Extended support status, which includes versions 11.5. 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-33520?
How do I fix CVE-2026-33520?
No fix has been published for CVE-2026-33520 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-33520 being exploited?
There is no known exploitation of CVE-2026-33520 in the wild and no public exploit code.
Sources
Also known as GHSA-g9fm-vqgf-6f8x.