Infinite loop in Telerik Document Processing XLS import
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-835.
Summary
Progress Telerik Document Processing SpreadProcessing library from 2026.3.811 before 2026.3.1006 contains an infinite loop flaw (CWE-835) when importing an XLS file. The import timeout is ignored when the file is specifically corrupted, which leaves a CPU thread unresponsive. An unauthenticated remote attacker can trigger this by supplying a crafted XLS file, causing denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
In Progress® Telerik® Document Processing SpreadProcessing library, versions prior to 2026.3.1006, an infinite loop vulnerability exists when importing an XLS file with a specifically-targted corruption, the import timeout is ignored resulting in an unresponsive CPU thread and denial of service.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 Telerik Document Processing Libraries to version 2026.3.1006 or later.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA Telerik Document Processing Libraries (Progress Software) Fixed in 2026.3.1006
Timeline
- 2026-10-07 Threatist record created from CVE-2026-106164
- 2026-10-07 CISA SSVC decision points changed
- 2026-10-07 Priority changed: MEDIUM → LOW
- 2026-10-07 Alias added: GHSA-3g99-jr36-v2mm
References
More Progress vulnerabilities
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- 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-2026-106164 · CVE Program
- CVE-2026-106164 · NVD
- FIRST EPSS
- GHSA-3g99-jr36-v2mm · 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