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Package details: pkg:nuget/System.Net.Security@4.3.0
purl pkg:nuget/System.Net.Security@4.3.0
Next non-vulnerable version 4.3.1
Latest non-vulnerable version 4.3.1
Risk 4.0
Vulnerabilities affecting this package (4)
Vulnerability Summary Fixed by
VCID-axvm-3dh9-3kf6
Aliases:
CVE-2017-0247
GHSA-6xh7-4v2w-36q6
Improper Input Validation A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests. NOTE: Microsoft has not commented on third-party claims that the issue is that the TextEncoder.EncodeCore function in the System.Text.Encodings.Web package in ASP.NET Core Mvc allows remote attackers to cause a denial of service by leveraging failure to properly calculate the length of 4-byte characters in the Unicode Non-Character range.
4.3.1
Affected by 0 other vulnerabilities.
VCID-b2mg-kc6t-z7ht
Aliases:
CVE-2017-0256
GHSA-j8f4-2w4p-mhjc
Improper Input Validation A spoofing vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.
4.3.1
Affected by 0 other vulnerabilities.
VCID-j4d8-wr24-63d3
Aliases:
CVE-2017-0248
GHSA-ch6p-4jcm-h8vh
Improper Certificate Validation Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to bypass Enhanced Security Usage taggings when they present a certificate that is invalid for a specific use, aka ".NET Security Feature Bypass Vulnerability."
4.3.1
Affected by 0 other vulnerabilities.
VCID-mrpr-pw4n-bfae
Aliases:
CVE-2017-0249
GHSA-qhqf-ghgh-x2m4
Improper Input Validation An elevation of privilege vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.
4.3.1
Affected by 0 other vulnerabilities.
Vulnerabilities fixed by this package (0)
Vulnerability Summary Aliases
This package is not known to fix vulnerabilities.

Date Actor Action Vulnerability Source VulnerableCode Version
2026-04-16T20:48:34.250876+00:00 GitLab Importer Affected by VCID-mrpr-pw4n-bfae https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0249.yml 38.4.0
2026-04-16T20:48:28.439985+00:00 GitLab Importer Affected by VCID-b2mg-kc6t-z7ht https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0256.yml 38.4.0
2026-04-16T20:48:23.119411+00:00 GitLab Importer Affected by VCID-j4d8-wr24-63d3 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0248.yml 38.4.0
2026-04-16T20:48:18.441382+00:00 GitLab Importer Affected by VCID-axvm-3dh9-3kf6 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0247.yml 38.4.0
2026-04-11T21:59:29.189464+00:00 GitLab Importer Affected by VCID-mrpr-pw4n-bfae https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0249.yml 38.3.0
2026-04-11T21:59:22.979120+00:00 GitLab Importer Affected by VCID-b2mg-kc6t-z7ht https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0256.yml 38.3.0
2026-04-11T21:59:15.365615+00:00 GitLab Importer Affected by VCID-j4d8-wr24-63d3 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0248.yml 38.3.0
2026-04-11T21:59:10.677793+00:00 GitLab Importer Affected by VCID-axvm-3dh9-3kf6 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0247.yml 38.3.0
2026-04-02T22:12:40.838284+00:00 GitLab Importer Affected by VCID-mrpr-pw4n-bfae https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0249.yml 38.1.0
2026-04-02T22:12:35.593284+00:00 GitLab Importer Affected by VCID-b2mg-kc6t-z7ht https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0256.yml 38.1.0
2026-04-02T22:12:30.133515+00:00 GitLab Importer Affected by VCID-j4d8-wr24-63d3 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0248.yml 38.1.0
2026-04-02T22:12:26.997828+00:00 GitLab Importer Affected by VCID-axvm-3dh9-3kf6 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0247.yml 38.1.0
2026-04-01T15:56:50.358116+00:00 GHSA Importer Affected by VCID-j4d8-wr24-63d3 https://github.com/advisories/GHSA-ch6p-4jcm-h8vh 38.0.0
2026-04-01T15:56:49.149065+00:00 GHSA Importer Affected by VCID-axvm-3dh9-3kf6 https://github.com/advisories/GHSA-6xh7-4v2w-36q6 38.0.0
2026-04-01T15:56:47.629744+00:00 GHSA Importer Affected by VCID-b2mg-kc6t-z7ht https://github.com/advisories/GHSA-j8f4-2w4p-mhjc 38.0.0
2026-04-01T15:56:46.696714+00:00 GHSA Importer Affected by VCID-mrpr-pw4n-bfae https://github.com/advisories/GHSA-qhqf-ghgh-x2m4 38.0.0
2026-04-01T13:03:35.463676+00:00 GithubOSV Importer Affected by VCID-b2mg-kc6t-z7ht https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2018/10/GHSA-j8f4-2w4p-mhjc/GHSA-j8f4-2w4p-mhjc.json 38.0.0
2026-04-01T13:03:34.230675+00:00 GithubOSV Importer Affected by VCID-axvm-3dh9-3kf6 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2018/10/GHSA-6xh7-4v2w-36q6/GHSA-6xh7-4v2w-36q6.json 38.0.0
2026-04-01T13:03:33.625093+00:00 GithubOSV Importer Affected by VCID-mrpr-pw4n-bfae https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2018/10/GHSA-qhqf-ghgh-x2m4/GHSA-qhqf-ghgh-x2m4.json 38.0.0
2026-04-01T13:03:20.156401+00:00 GithubOSV Importer Affected by VCID-j4d8-wr24-63d3 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2018/10/GHSA-ch6p-4jcm-h8vh/GHSA-ch6p-4jcm-h8vh.json 38.0.0
2026-04-01T12:48:01.923529+00:00 GitLab Importer Affected by VCID-mrpr-pw4n-bfae https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0249.yml 38.0.0
2026-04-01T12:48:01.514241+00:00 GitLab Importer Affected by VCID-b2mg-kc6t-z7ht https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0256.yml 38.0.0
2026-04-01T12:48:01.210388+00:00 GitLab Importer Affected by VCID-j4d8-wr24-63d3 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0248.yml 38.0.0
2026-04-01T12:48:00.977610+00:00 GitLab Importer Affected by VCID-axvm-3dh9-3kf6 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/nuget/System.Net.Security/CVE-2017-0247.yml 38.0.0