How severe is CVE-2026-118037?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Progress Software Telerik Document Processing Libraries

CVE-2026-118037

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.

Published 2026-10-28 · last modified 2026-10-28.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Progress Software Telerik Document Processing Libraries

Weakness classification (CWE)

References

docs.telerik.com/devtools/document-processing/knowledge-base/kb-security-uncont… (vendor-advisory)

Frequently asked questions

What is CVE-2026-118037?: CVE-2026-118037 is a high-severity vulnerability in Progress Software Telerik Document Processing Libraries, classified under CWE-606. CVSS score: 7.5/10. Published 2026-10-28.
How severe is CVE-2026-118037?: High severity. CVSS v3 base score is 7.5 out of 10.