CVE-2026-124705
URL Redirection to Untrusted Site in Progress Telerik UI for .NET MAUI
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.
Fixes and workarounds
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: ProgressSoftwareAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Telerik UI for .NET MAUI Progress Software |
≥ 5.2.0; < 16.0.0 (affected, custom)
Other versions: unaffected |
CNA: ProgressSoftware |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.8 high |
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CNA: ProgressSoftware |
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-2026-124705CNA: ProgressSoftware · vendor-advisory
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