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PatchSiren cyber security CVE debrief

CVE-2026-13019 Esri CVE debrief

CVE-2026-13019 is a critical vulnerability in Esri Portal for ArcGIS versions 12.1 and earlier on Windows, Linux, and Kubernetes. The vulnerability allows a remote, unauthenticated attacker to access an unprotected API, with a CVSS score of 9.8. This vulnerability is caused by a missing authentication for a critical function in Esri Portal for ArcGIS. The vulnerability can be exploited by an attacker to access sensitive information or disrupt service. Organizations using Esri Portal for ArcGIS versions 12.1 and earlier should prioritize patching this vulnerability to prevent potential exploitation.

Vendor
Esri
Product
Portal for ArcGIS
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-07
Original CVE updated
2026-09-29
Advisory published
2026-07-07
Advisory updated
2026-09-29

Who should care

Organizations using Esri Portal for ArcGIS versions 12.1 and earlier should prioritize patching this vulnerability to prevent potential exploitation. The vulnerability can be exploited remotely, and the CVSS score is 9.8, indicating a critical severity. The vulnerability affects Esri Portal for ArcGIS on Windows, Linux, and Kubernetes. Security teams and administrators responsible for Esri Portal for ArcGIS deployments should take immediate action to patch or mitigate this vulnerability.

Technical summary

The vulnerability is caused by a missing authentication for a critical function in Esri Portal for ArcGIS. This allows an attacker to access an unprotected API without authentication. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The vulnerability affects Esri Portal for ArcGIS versions 12.1 and earlier on Windows, Linux, and Kubernetes. The vulnerability can be exploited remotely, and the CVSS score is 9.8, indicating a critical severity.

Defensive priority

High

Recommended defensive actions

  • Apply patches or updates provided by Esri to address the vulnerability
  • Review and update access controls for Esri Portal for ArcGIS APIs
  • Monitor for suspicious activity related to Esri Portal for ArcGIS
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-07T17:16:35.400Z and has not been modified since then. The NVD entry is currently Received. The Esri Portal for ArcGIS versions 12.1 and earlier on Windows, Linux, and Kubernetes are affected by this vulnerability. The vulnerability allows a remote, unauthenticated attacker to access an unprotected API. The CVSS score is 9.8, indicating a critical severity. The CVE record does not provide additional information on exploitation or affected systems.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-13019 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-13019

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-13019 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-13019

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.esri.com/arcgis-blog/products/trust-arcgis/administration/june-2026-arcgis-security-bulletin

    [email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.