# CVE-2026-9182: Esri ArcGIS Server unrestricted file upload

Source: https://junglewise.ai/threats/cve-2026-9182-esri-arcgis-server-unrestricted-file-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-06. Updated: 2026-07-06  
License: CC BY 4.0 with a link back

CVE-2026-9182 · Severity: medium · CVSS 5.3 · Published 2026-07-06

ArcGIS Server, a platform used for sharing geographic information and maps, contains a security flaw that allows unauthorized users to upload files to the system. An attacker could exploit this to place unauthorized files on the server, potentially leading to data integrity issues or further system compromise. Organizations using affected versions should apply the security updates provided by Esri to prevent unauthorized file modifications.

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

## Quick answers

**Is CVE-2026-9182 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9182 being exploited in the wild.

**How severe is CVE-2026-9182?** Medium severity, with a CVSS score of 5.3, published 6 July 2026.

**Which products and versions are affected?** Esri ArcGIS Server <= 12.0.

**Is there a fix for CVE-2026-9182?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-9182 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-9182?** 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.

## Technical details

An unrestricted file upload vulnerability (CWE-434) exists in ArcGIS Server through version 12.0. The flaw is located in an affected endpoint that fails to properly validate or restrict the types of files being uploaded. A remote, unauthenticated attacker can exploit this by sending a specially crafted request to the endpoint, resulting in arbitrary file upload to the server. While the provided CVSS score suggests limited impact (Integrity: Low), such vulnerabilities often serve as a precursor to remote code execution if the uploaded files can be accessed and executed by the web server. The vulnerability affects both Windows and Linux deployments.

## Affected products

- Esri ArcGIS Server <= 12.0

## Timeline

- 2026-07-06: disclosed
- 2026-07-06: advisory

## References

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

## Related threats

- [Esri ArcGIS Server stored XSS in file uploads](https://junglewise.ai/threats/cve-2026-50095-there-is-a-stored-cross-site-scripting-issue-in-esri-arcgis)
- [Esri ArcGIS Server unauthenticated service metadata update](https://junglewise.ai/threats/cve-2026-33522-esri-arcgis-server-versions-11-3-to-12-0-only-allows-a-remote)
- [Esri ArcGIS Server denial of service in request handling](https://junglewise.ai/threats/cve-2026-33521-there-is-s-denial-of-service-vulnerability-in-esri-arcgis-server)
- [Esri ArcGIS Server SQL injection](https://junglewise.ai/threats/cve-2026-10757-there-is-a-sql-injection-vulnerability-in-esri-arcgis-server)
- [Esri ArcGIS Server directory traversal](https://junglewise.ai/threats/cve-2026-9181-esri-arcgis-server-directory-traversal)