CVE-2026-55254

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 ...

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 crafted expressions with extremely large factorial operands, causing excessive CPU consumption or a non-terminating loop due ...

CVE-2026-55254

NCalc (.NET) contains a DoS via the factorial operator in the NCalc.Core/Helpers/MathHelper.cs path. Prior to v6.1.1, evaluating expressions with extremely large factorial operands can cause excessive CPU usage or a non-terminating loop due to integer overflow. A fix was implemented in v6.1.1 tha...

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 crafted expressions with extremely large factorial operands, causing excessive CPU consumption or a non-terminating loop due ...

CVE-2026-55254

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 ...

CVE-2026-55254: Allocation of Resources Without Limits or Throttling

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 ...

NCalc: Denial of Service via Unbounded and Non-Terminating Factorial Evaluation

Impact A denial-of-service DoS vulnerability exists in the factorial operator implementation of NCalc. Specially crafted expressions containing extremely large factorial operands can trigger excessive CPU consumption or cause evaluation to enter a non-terminating loop due to integer overflow in t...

PT-2026-50732

Name of the Vulnerable Software and Affected Versions NCalc versions prior to 6.1.1 Description The factorial operator implementation in src/NCalc.Core/Helpers/MathHelper.cs allows specially crafted expressions with extremely large factorial operands to cause excessive CPU consumption or a...