--- id: CVE-2026-47304 title: .NET Security Feature Bypass Vulnerability summary: >- Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network. severity: high cvss: 8.1 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C' cvssSource: cna cwe: - CWE-347 - CWE-345 vendor: Microsoft product: .NET 10.0 runtime affected: - .net_10.0_runtime >= 10.0.0 < 10.0.10 - .net_8.0_runtime >= 8.0.0 < 8.0.29 - .net_9.0_runtime >= 9.0.0 < 9.0.18 - .net_framework_3.5 >= 3.5.0 < 2.0.50727.8983 & 3.0.30729.8978 - >- .net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0 - >- .net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0 - >- .net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 - .net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4143.0 - .net_framework_4.8 >= 4.8.0 < 4.8.4803.0 - .net_framework_4.8.1 >= 4.8.0.0 < 4.8.9340.0 - visual_studio_2017_version_15.9_includes_15.0_-_15.8 - - visual_studio_2019_version_16.11_includes_16.0_-_16.10 - - visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.22 - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.36 - visual_studio_2026_version_18.5 - - visual_studio_2026_version_18.7 >= 18.0 < 18.7.4 ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2026-07-15T03:57:19.256900Z' published: '2026-07-14' updated: '2026-10-28' sourceUpdated: '2026-10-28T20:02:29.104Z' source: CVEORG sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-47304' references: - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47304' label: .NET Security Feature Bypass Vulnerability - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47304.json - url: 'https://access.redhat.com/security/cve/CVE-2026-47304' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2500509' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-47304' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47304' - url: 'https://access.redhat.com/errata/RHSA-2026:58566' - url: 'https://access.redhat.com/errata/RHSA-2026:58567' - url: 'https://access.redhat.com/errata/RHSA-2026:41897' - url: 'https://access.redhat.com/errata/RHSA-2026:41893' - url: 'https://access.redhat.com/errata/RHSA-2026:41895' - url: 'https://access.redhat.com/errata/RHSA-2026:41900' - url: 'https://access.redhat.com/errata/RHSA-2026:41901' - url: 'https://access.redhat.com/errata/RHSA-2026:41899' - url: 'https://access.redhat.com/errata/RHSA-2026:58568' - url: 'https://access.redhat.com/errata/RHSA-2026:58569' - url: 'https://access.redhat.com/errata/RHSA-2026:58570' - url: 'https://access.redhat.com/errata/RHSA-2026:41898' - url: 'https://access.redhat.com/errata/RHSA-2026:41894' - url: 'https://access.redhat.com/errata/RHSA-2026:41896' - url: 'https://access.redhat.com/errata/RHSA-2026:42145' - url: 'https://access.redhat.com/errata/RHSA-2026:39952' - url: 'https://github.com/dotnet/runtime/security/advisories/GHSA-g8r8-53c2-pm3f' - url: 'https://github.com/dotnet/announcements/issues/412' - url: 'https://github.com/dotnet/runtime/issues/130709' - url: 'https://github.com/advisories/GHSA-g8r8-53c2-pm3f' tags: - cve.org - csaf - vex - red-hat - ghsa - nuget epss: 0.00286 epssPercentile: 0.21087 aliases: - GHSA-g8r8-53c2-pm3f ecosystem: nuget patched: - enterprise_linux_appstream_eus_v_10_0 - enterprise_linux_appstream_v_10 - enterprise_linux_appstream_v_8 - enterprise_linux_appstream_e4s_v_9_4 - enterprise_linux_appstream_eus_v_9_6 - enterprise_linux_appstream_v_9 - enterprise_linux_codeready_linux_builder_eus_v_10_0 - enterprise_linux_codeready_linux_builder_v_10 - enterprise_linux_crb_v_8 - codeready_linux_builder_eus_v_9_6 - enterprise_linux_codeready_linux_builder_v_9 - hardened_images ingestedAt: '2026-07-20T23:44:02.849Z' --- ## Overview Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network. ## Affected - `.net_10.0_runtime >= 10.0.0 < 10.0.10` - `.net_8.0_runtime >= 8.0.0 < 8.0.29` - `.net_9.0_runtime >= 9.0.0 < 9.0.18` - `.net_framework_3.5 >= 3.5.0 < 2.0.50727.8983 & 3.0.30729.8978` - `.net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0` - `.net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0` - `.net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0` - `.net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4143.0` - `.net_framework_4.8 >= 4.8.0 < 4.8.4803.0` - `.net_framework_4.8.1 >= 4.8.0.0 < 4.8.9340.0` - `visual_studio_2017_version_15.9_includes_15.0_-_15.8 -` - `visual_studio_2019_version_16.11_includes_16.0_-_16.10 -` - `visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.22` - `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.36` - `visual_studio_2026_version_18.5 -` - `visual_studio_2026_version_18.7 >= 18.0 < 18.7.4` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Package advisory (CVE-2026-47304) Affected packages: - `System.Security.Cryptography.Xml >= 10.0.0, <= 10.0.9` - `System.Security.Cryptography.Xml >= 9.0.0, <= 9.0.17` - `System.Security.Cryptography.Xml >= 8.0.0, <= 8.0.28` Patched in: - `System.Security.Cryptography.Xml 10.0.10` - `System.Security.Cryptography.Xml 9.0.18` - `System.Security.Cryptography.Xml 8.0.29` Source: https://github.com/advisories/GHSA-g8r8-53c2-pm3f ## Vendor advisories - **RHSA-2026:58566** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58566) - **RHSA-2026:58567** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58567) - **RHSA-2026:41897** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41897) - **RHSA-2026:41893** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41893) - **RHSA-2026:41895** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41895) - **RHSA-2026:41900** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41900) - **RHSA-2026:41901** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41901) - **RHSA-2026:41899** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-07-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:41899) - **RHSA-2026:58568** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58568) - **RHSA-2026:58569** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58569) - **RHSA-2026:58570** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6) · released 2026-08-24 · [advisory](https://access.redhat.com/errata/RHSA-2026:58570)