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CVE-2026-55254

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

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
ncalc / ncalcaffected < 6.1.1

CWE

CWE-770, CWE-190

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.