{"id":"CVE-2026-102870","title":"Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.","summary":"Improper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"Microsoft","product":"Microsoft.AspNetCore.Components.WebAssembly.Server","affected":["Microsoft.AspNetCore.Components.WebAssembly.Server >= 10.0.0, <= 10.0.12","Microsoft.AspNetCore.Components.WebAssembly.Server >= 11.0.0-preview.1, <= 11.0.0-rc.1"],"patched":["Microsoft.AspNetCore.Components.WebAssembly.Server 10.0.13","Microsoft.AspNetCore.Components.WebAssembly.Server 11.0.0-rc.2.26478.115"],"published":"2026-10-13","updated":"2026-10-14","sourceUpdated":"2026-10-14T04:18:08.113","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102870","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102870","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/aspnetcore/security/advisories/GHSA-g27p-qf6j-c96c"},{"url":"https://github.com/dotnet/announcements/issues/445"},{"url":"https://github.com/dotnet/aspnetcore/discussions/69791"},{"url":"https://github.com/advisories/GHSA-g27p-qf6j-c96c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102870.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-102870"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2548777"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102870"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102870"},{"url":"https://access.redhat.com/errata/RHSA-2026:86195"},{"url":"https://access.redhat.com/errata/RHSA-2026:86192"},{"url":"https://access.redhat.com/errata/RHSA-2026:86193"}],"tags":["nvd","ghsa","nuget","cve.org","csaf","vex","red-hat"],"aliases":["GHSA-g27p-qf6j-c96c"],"ecosystem":"nuget","ingestedAt":"2026-10-13T19:43:28.900Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-08T00:00:00+00:00"},"epss":0.00906,"epssPercentile":0.59663,"slug":"CVE-2026-102870","body":"## Overview\n\nImproper control of generation of code ('code injection') in ASP.NET Core allows an unauthorized attacker to execute code over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-102870)\n\nAffected packages:\n\n- `Microsoft.AspNetCore.Components.WebAssembly.Server >= 10.0.0, <= 10.0.12`\n- `Microsoft.AspNetCore.Components.WebAssembly.Server >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n\nPatched in:\n\n- `Microsoft.AspNetCore.Components.WebAssembly.Server 10.0.13`\n- `Microsoft.AspNetCore.Components.WebAssembly.Server 11.0.0-rc.2.26478.115`\n\nSource: https://github.com/advisories/GHSA-g27p-qf6j-c96c\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102870.json)\n- **RHSA-2026:86195** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86195)\n- **RHSA-2026:86192** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86192)\n- **RHSA-2026:86193** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86193)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}