Privilege escalation in Telerik Report Server service-agent hub
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-266.
Summary
Progress Telerik Report Server before 12.2.26.1007 is affected. Incorrect privilege assignment (CWE-266) in the service-agent SignalR hub lets an authenticated user, including a guest with a valid bearer token, register as a trusted service agent. The rogue agent then receives storage settings and encryption private keys during the next settings sync, exposing stored data-source credentials and connection strings.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Upgrade Progress Telerik Report Server to version 12.2.26.1007 or later.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA Telerik Report Server (Progress Software) Fixed in 12.2.26.1007
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Progress Software Telerik Report Server 12.2.26.1007
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-69870 Stored cross-site scripting in Telerik Report Server web report viewersPriority MEDIUM 40
Timeline
- 2026-10-09 Threatist record created from CVE-2026-106145
- 2026-10-09 Alias added: GHSA-mqv8-78j6-26gw
- 2026-10-10 CISA SSVC decision points changed
- 2026-10-10 Priority changed: MEDIUM → LOW
References
More Progress vulnerabilities
- TI-2026-07083 Command injection in Progress LoadMaster KEVCVSS 3.1CRITICAL 9.8
- TI-2024-06182 WhatsUp Gold HasErrors SQL Injection Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2024-04541 WhatsUp Gold GetFileWithoutZip Directory Traversal Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2024-04060 Registration Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2024-01127 LoadMaster Pre-Authenticated OS Command Injection KEVCVSS 3.1CRITICAL 10.0
- TI-2023-20934 WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability KEVCVSS 3.1CRITICAL 10.0
Sources
- CVE-2026-106145 · CVE Program
- CVE-2026-106145 · NVD
- FIRST EPSS
- GHSA-mqv8-78j6-26gw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences