In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler provider type input may be tampered with, potentially altering dialog processing and enabling chained exploitation.
Casky was already ahead
This CVE exploits attack patterns that Casky's 0matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
CVE-2026-13187 affects Progress Telerik UI for AJAX versions prior to 2026.2.708 and involves improper input validation on the DialogHandler provider type parameter. This vulnerability allows attackers to tamper with provider type inputs, potentially altering how dialogs are processed within web applications. Organizations using Telerik UI components in enterprise applications, portals, and data-driven web systems are at risk. With a CVSS score of 8.1, this vulnerability represents a high-severity threat that could enable unauthorized manipulation of application behavior and facilitate chained exploitation attacks.
While CVE-2026-13187 does not currently map to specific MITRE ATT&CK techniques, Casky's security skills powered by Claude AI with extended reasoning capabilities would detect related attack patterns by analyzing input validation failures and provider type manipulation attempts. Practitioners using Casky would observe findings related to CWE-470 (Improper Input Validation) signatures, including suspicious modifications to DialogHandler configuration parameters, unusual provider type instantiation attempts, and evidence of parameter tampering in application logs. The platform's 754 mapped security skills would correlate these indicators with broader exploitation chains, helping practitioners identify whether attackers are leveraging this vulnerability as a foothold for privilege escalation, lateral movement, or persistence mechanisms.
Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →
Casky has 0 skills that investigate the attack patterns behind CVE-2026-13187. Run one and get CVSS-scored findings in 3 minutes.
Run the skill that detects this →© 2026 Casky.AI, Inc. · AI Security Investigation