# CVE-2026-33522: Esri ArcGIS Server unauthenticated service metadata update

Source: https://junglewise.ai/threats/cve-2026-33522-esri-arcgis-server-versions-11-3-to-12-0-only-allows-a-remote  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-33522 · Severity: medium · CVSS 5.3 · Published 2026-10-26

Esri ArcGIS Server is a web-based mapping and geospatial data management platform used by organizations to publish and manage geographic information. An unauthenticated attacker can remotely modify service metadata without authorization, potentially leading to service misconfiguration or data integrity issues. The vulnerability affects versions 11.3 through 12.0.

Technologies: [Esri ArcGIS Server](https://junglewise.ai/threats/technologies/arcgis-server). Vendors: [Esri](https://junglewise.ai/threats/vendors/esri).

## Quick answers

**Is CVE-2026-33522 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33522 being exploited in the wild.

**How severe is CVE-2026-33522?** Medium severity, with a CVSS score of 5.3, published 26 October 2026.

**Which products and versions are affected?** Esri ArcGIS Server 11.3 to 12.0.

**Is there a fix for CVE-2026-33522?** Yes: fixed in ArcGIS Server 12.0, 11.5, 11.3 (patched versions). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-33522 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-33522?** Check whether you run Esri ArcGIS Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in ArcGIS Server 12.0, 11.5, 11.3 (patched versions)

## Technical details

An authorization bypass in ArcGIS Server allows remote, unauthenticated attackers to update service metadata via network access. The vulnerability affects versions 11.3 to 12.0; patches are available for versions 12.0, 11.5, and 11.3 in General Availability and Extended support status. Successful exploitation permits unauthorized modification of service configuration without authentication.

## Affected products

- Esri ArcGIS Server 11.3 to 12.0

## Timeline

- 2026-10-26: disclosed

## References

- [https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/october-2026-arcgis-security-bulletin](https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/october-2026-arcgis-security-bulletin)

## Related threats

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- [Esri ArcGIS Server unrestricted file upload](https://junglewise.ai/threats/cve-2026-9182-esri-arcgis-server-unrestricted-file-upload)
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