A denial of service vulnerability exists when .NET Framework and .NET Core improperly process RegEx strings, aka '.NET Framework and .NET Core Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0980, CVE-2019-0981.

Affected Packages

NuGet System.Text.RegularExpressions

Affected versions: 4.3.0 (fixed in 4.3.1)

Related CVEs

CVE-2019-0820

Key Information

GHSA ID

GHSA-cmhx-cq75-c4mj

Published

August 4, 2021 9:03 PM

Last Modified

February 21, 2023 6:57 PM

CVSS Score

7.5 /10

Primary Ecosystem

NuGet

Primary Package

System.Text.RegularExpressions

GitHub Reviewed

✓ Yes

Dataset

Last updated: July 27, 2025 6:35 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.