# CVE-2026-124705: URL Redirection to Untrusted Site in Progress Telerik UI for .NET MAUI

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

In Progress® Telerik® UI for .NET MAUI prior to version 16.0.0, an untrusted URL redirection vulnerability in the RadRichTextEditor hyperlink handling and the RadPdfViewer link annotation handling allows an unauthenticated attacker to launch arbitrary operating system protocol handlers with attacker-controlled arguments via a crafted document or PDF link with a non-allowlisted URI scheme that the user opens.

## Remediation

- workaround: For RadPdfViewer, handle the LinkAnnotationTapped event, set Handled to true and launch only URIs with trusted schemes (http, https, mailto, tel). RadRichTextEditor has no equivalent event in the affected versions, so avoid loading documents from untrusted sources or upgrade to the fixed version. (source: CNA: ProgressSoftware)

## Affected products and versions

- Progress Software / Telerik UI for .NET MAUI: ≥ 5.2.0; < 16.0.0 (affected, custom). Source: CNA: ProgressSoftware

## Severity and prioritization

- CVSS 3.1: 7.8 (high); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H; source: CNA: ProgressSoftware

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-601

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.telerik.com/maui-ui/documentation/knowledge-base/kb-security-untrusted-url-redirection-cve-2026-124705 (CNA: ProgressSoftware; vendor-advisory)

## Provenance

- CNA: ProgressSoftware: https://www.cve.org/CVERecord?id=CVE-2026-124705; retrieved 2026-11-12; source updated 2026-11-12

Revision: b983d510a14741243dd61a8ba8e6305e13e9f77d18c1c9e79a84214b84411290

Canonical: https://y2.dev/cve/CVE-2026-124705

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