What is CVE-2026-2812?

CVE-2026-2812 is a medium-severity vulnerability in Esri Arcgis Server, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-05-20.

How severe is CVE-2026-2812?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Esri Arcgis Server

CVE-2026-2812

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 resu…

Vulnerability class: Broken Authentication

EPSS: 0.001 (26.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Esri Arcgis Server — versions 11.1
Esri Arcgis_server
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

psirt@esri.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-2812?: CVE-2026-2812 is a medium-severity vulnerability in Esri Arcgis Server, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-05-20.
How severe is CVE-2026-2812?: Medium severity. CVSS v3 base score is 5.3 out of 10.