CVE-2026-55254 — NCalc: Denial of Service via Unbounded and Non-Terminating Factorial Evaluation
NCalc is a fast, lightweight expression evaluator for .NET. Prior to 6.1.1, the factorial operator implementation in src/NCalc.Core/Helpers/MathHelper.cs permits specially craft…
Published: 2026-07-17 · CVSS: 4.8 · CVSS 3.1
NCalc is a fast, lightweight expression evaluator for .NET. Prior to 6.1.1, the factorial operator implementation in src/NCalc.Core/Helpers/MathHelper.cs permits specially crafted expressions with extremely large factorial operands, causing excessive CPU consumption or a non-terminating loop due to integer overflow in the factorial calculation logic when applications evaluate untrusted expressions. This issue is fixed in version 6.1.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7