# CVE-2026-19219: DialogHandler UploadPaths Tampering Vulnerability in Telerik UI for ASP.NET AJAX

> Attackers with encryption keys can tamper with file browser paths to upload malicious files, leading to remote code execution in Telerik UI for ASP.NET AJAX.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Sep 2026
- **Updated:** 3 Sep 2026
- **Also known as:** GHSA-82ph-hv94-946r

## What is CVE-2026-19219?

CVE-2026-19219 is a high-severity vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Progress® Telerik® UI for AJAX prior to v2026.3.812, insufficient integrity protection of dialog request parameters used by the RadEditor file browser may allow an attacker who has obtained certain application encryption key material to alter the folders the file browser reads from, writes to, and uploads into, potentially resulting in remote code execution.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-345 (Insufficient Verification of Data Authenticity)

## Which versions are affected by CVE-2026-19219?


## How do I fix CVE-2026-19219?

No fix has been published for CVE-2026-19219 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19219 being exploited?

There is no known exploitation of CVE-2026-19219 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19219 and fix it if it is affected.

What it is: CVE-2026-19219 is a high-severity vulnerability in Progress Software Telerik UI for ASP.NET AJAX, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-19219 in the wild and no public exploit code.

Affected product: Progress Software Telerik UI for ASP.NET AJAX. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-19219/ (Markdown: https://insights.sbomify.com/CVE-2026-19219/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19219
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19219
- OSV: https://osv.dev/vulnerability/CVE-2026-19219

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19219/
Summaries are generated and may contain mistakes; the official description above is the record.