What is CVE-2026-13181?

CVE-2026-13181 is a high-severity vulnerability in Progress Telerik Ui For Asp.net Ajax, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 8.1/10. Published 2026-07-22.

How severe is CVE-2026-13181?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Progress Telerik Ui For Asp.net Ajax

CVE-2026-13181

In Progress® Telerik® UI for AJAX prior to v2026.2.708, forged upload metadata can influence AsyncUploadTypeName processing and trigger unsafe attacker-controlled type resolution, enabling remote code execution in affected deployments.

EPSS: 0.007 (49.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Progress Telerik_ui_for_asp.net_ajax
Progress Software Telerik Ui For Asp.net Ajax — versions 2010.1.309

Weakness classification (CWE)

CWE-470 — Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection)

References

security@progress.com (vendor-advisory, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-13181?: CVE-2026-13181 is a high-severity vulnerability in Progress Telerik Ui For Asp.net Ajax, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 8.1/10. Published 2026-07-22.
How severe is CVE-2026-13181?: High severity. CVSS v3 base score is 8.1 out of 10.