CVE-2026-118037: Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadSpreadProcessing and RadSpreadStreamProcessing

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-28 · updated 2026-10-28
Weakness: CWE-606

Description

In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, uncontrolled recursion, infinite loop, unchecked loop condition and inefficient regular expression vulnerabilities in RadSpreadProcessing and RadSpreadStreamProcessing allow an unauthenticated attacker to terminate or hang the host process via a crafted XLSX or XLS workbook or formula.

Affected products

Progress Software Telerik Document Processing Libraries: before 2026.3.1027 — fixed in 2026.3.1027

How to fix

Upgrade to a fixed version: Progress Software Telerik Document Processing Libraries 2026.3.1027. Check the vendor advisory for mitigations.

References

https://docs.telerik.com/devtools/document-processing/knowledge-base/kb-security-uncontrolled-resource-consumption-spreadprocessing-cve-2026-118037

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