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CVE-2026-19219 is an insufficient integrity-protection vulnerability in Progress Telerik UI for AJAX versions before 2026.3.812. The RadEditor file browser's dialog request parameters can be modified by an attacker possessing certain application encryption key material, allowing tampering with the folders used by the DialogHandler to read, write, and upload files. The vulnerability is classified primarily as CWE-345 and may enable dangerous file-upload behavior associated with CWE-434.
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No public exploit code observed for this vulnerability.
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6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability affecting Telerik UI for ASP.NET AJAX. The supplied CVSS v3 vector indicates a network-reachable, no-privileges, no-user-interaction issue with high attack complexity and high confidentiality, integrity, and availability impact.
An UploadPaths tampering vulnerability in Telerik Web Forms DialogHandler, affecting Telerik UI for ASP.NET AJAX versions prior to 2026.3.812.
An UploadPaths tampering vulnerability in Telerik Web Forms DialogHandler within Telerik UI for ASP.NET AJAX.
An insufficient integrity-protection vulnerability in Telerik UI for AJAX's RadEditor file-browser dialog parameters. An attacker who has obtained certain application encryption key material may modify accessible read, write, and upload directories, potentially achieving remote code execution.
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.