CVE-2026-9182

Unvalidated File Upload vulnerability in ArcGIS Server.

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 0.62 % · percentile 49 (2026-10-27)
State: PUBLISHED
Published: 2026-07-06
Updated: 2026-07-08
Assigner: Esri
NVD status: Modified

Description

Esri ArcGIS Server contains an unrestricted file upload vulnerability. An unauthenticated attacker could exploit this issue by uploading a crafted file to the affected endpoint. Successful exploitation could allow arbitrary file upload, potentially allowing for other attacks. This issue impacts all versions of ArcGIS Server on Windows and Linux 12.0 and prior. This issue does not impact ArcGIS Enterprise for Kubernetes.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Esri
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · psirt@esri.com (Secondary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Secondary)

Weaknesses (CWE)

CWE-434

European references

ENISA EUVD · EUVD-2026-41896
GCVE · GCVE-0-2026-9182

Affected configurations (NVD CPE)

cpe:2.3:a:esri:arcgis_server:*:*:*:*:*:*:*:* ≤ 12.0

Affected products

Product	Versions
Esri · ArcGIS Server	affected 0 ≤ 12.0

References

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

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD