CVE-2026-106145: Privilege Escalation in Telerik Report Server Service-Agent Hub

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-09 · updated 2026-10-09
Weakness: CWE-266

Description

In Progress® Telerik® Report Server prior to version 12.2.26.1007, incorrect privilege assignment in the service-agent SignalR hub allows an authenticated user, including a low-privilege or guest account with a valid bearer token, to register as a trusted service agent. On the next server settings-synchronization event, the rogue agent receives storage settings and encryption private keys. This privilege escalation enables disclosure of protected secrets, including stored data-source credentials and connection strings, and allows agent impersonation and interference with task dispatch.

Affected products

Progress Software Corporation Telerik Report Server: before 12.2.26.1007 — fixed in 12.2.26.1007

How to fix

Upgrade to a fixed version: Progress Software Corporation Telerik Report Server 12.2.26.1007. Check the vendor advisory for mitigations.

References

https://www.telerik.com/report-server/documentation/knowledge-base/kb-security-incorrect-privilege-assignment-cve-2026-106145

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