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CVE-2026-13019 is a critical missing-authentication-for-critical-function vulnerability in Esri Portal for ArcGIS affecting versions 12.1 and earlier on Windows, Linux, and Kubernetes. The flaw exposes an unprotected API associated with a critical function, allowing a remote attacker to reach functionality that should require authentication. Available reporting indicates the issue can be exploited without prior authentication and may enable takeover of user accounts in affected deployments, particularly where built-in accounts are enabled.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical missing authentication vulnerability in Portal for ArcGIS that allows unauthenticated remote attackers to access an unprotected API and take over user accounts.
A missing authentication for critical function vulnerability in Esri Portal for ArcGIS that allows a remote unauthenticated attacker to access an unprotected API.
A missing authentication for critical function vulnerability in Esri Portal for ArcGIS that allows a remote unauthenticated attacker to access an unprotected API.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.