CVE-2026-2812

Improper Authentication issue in ArcGIS Server

At a glance

Severity: MEDIUM 5.3
EPSS: EPSS 0.36 % · percentile 30 (2026-10-27)
State: PUBLISHED
Published: 2026-05-20
Updated: 2026-05-20
Assigner: Esri
NVD status: Analyzed

Description

ArcGIS Server contains an improper authentication vulnerability in an undocumented administrative endpoint. An unauthenticated attacker could exploit this issue by sending a crafted request to the endpoint. Successful exploitation may result in disruption of the web-based browsing interface. This issue affects ArcGIS Server 12.0 and earlier.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	Esri
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	NVD · psirt@esri.com (Secondary)

Weaknesses (CWE)

CWE-287

European references

ENISA EUVD · EUVD-2026-31147
GCVE · GCVE-0-2026-2812

Affected configurations (NVD CPE)

cpe:2.3:a:esri:arcgis_server:*:*:*:*:*:*:*:* ≥ 11.1 ≤ 12.0

Affected products

Product	Versions
Esri · ArcGIS Server	affected 11.1 ≤ 12.0

References

https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/april2026_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