TI-2026-02416 Aliases CVE-2026-2812 GHSA-3wjj-6pp2-788h

Improper Authentication issue in ArcGIS Server

LOW 30CWE-287Published 2026-05-20 · Updated 2026-05-20

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0036 29th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Esri	ArcGIS Server	11.1 – 12.0	—	No fix listed	CNA

ArcGIS Server VendorEsri Affected 11.1 – 12.0 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:esri:arcgis_server::::::::	11.1 – 12.0	Vulnerable	Esri
cpe:2.3:o:linux:linux_kernel:-:::::::*	not specified by NVD	Running on	Linux
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:esri:arcgis_server:*:*:*:*:*:*:*:* Versions 11.1 – 12.0 Vulnerable ·Esri
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-2812
2026-10-03 Alias added: GHSA-3wjj-6pp2-788h

References

Advisory 1

https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/april2026_security_bulletin

TI-2026-08070 Directory Traversal in ArcGIS Server CVSS 3.1CRITICAL 9.8
TI-2025-35724 BUG-000179884 - There is a security vulnerability in ArcGIS Server Feature Services. CVSS 3.1CRITICAL 10.0
TI-2021-10000 SQL injection vulnerability in ArcGIS Server CVSS 3.1CRITICAL 9.8
TI-2021-09989 There is a Server-Side Request Forgery (SSRF) vulnerability in Esri ArcGIS Server Manager version 10.8.1 and below. CVSS 3.1CRITICAL 9.1
TI-2026-08071 Unvalidated File Upload vulnerability in ArcGIS Server. CVSS 3.1CRITICAL 9.8
TI-2020-18172 Esri ArcGIS Server before 10.8 is vulnerable to SSRF in some configurations. CVSS 3.1CRITICAL 9.8

See all 68 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences