VulnerabilityAnalyzed

CVE-2026-13188

In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.

MEDIUM 5.9EPSS 0.16%

Does this matter?

Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler request parameters may be tampered with, potentially altering dialog server-side behavior and enabling chained exploitation.

CVSS 3.1: 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS: 0.16% probability · 5th percentile
CISA KEV: Not listed
Weakness: CWE-345
Affected: progress/telerik ui for asp.net ajax
Source: security@progress.com

References

https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-dialoghandler-parameters-tampering-CVE-2026-13188Vendor Advisory, Mitigation

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.