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high · CVSS 7.8

CVE-2026-114148

ASP.NET Core Elevation of Privilege Vulnerability

Published 29 Oct 2026 · Source updated 31 Oct 2026 · Retrieved 2026-10-31 21:59 UTC

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What happened?

See the source record for the publisher’s description.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
.NET 10.0 installed on LinuxMicrosoftaffected: 10.0.0 to < 10.0.403See vendor advisory
.NET 10.0 installed on Mac OSMicrosoftaffected: 10.0.0 to < 10.0.403See vendor advisory
.NET 10.0 installed on WindowsMicrosoftaffected: 10.0.0 to < 10.0.403See vendor advisory
.NET 11.0 installed on LinuxMicrosoftaffected: 11.0.0-preview.1 to < 11.0.100-rc.3See vendor advisory
.NET 11.0 installed on Mac OSMicrosoftaffected: 11.0.0-preview.1 to < 11.0.100-rc.3See vendor advisory
.NET 11.0 installed on WindowsMicrosoftaffected: 11.0.0-preview.1 to < 11.0.100-rc.3See vendor advisory
.NET 8.0 installed on LinuxMicrosoftaffected: 8.0.0 to < 8.0.427See vendor advisory
.NET 8.0 installed on Mac OSMicrosoftaffected: 8.0.0 to < 8.0.427See vendor advisory
.NET 8.0 installed on WindowsMicrosoftaffected: 8.0.0 to < 8.0.427See vendor advisory
.NET 9.0 installed on LinuxMicrosoftaffected: 9.0.0 to < 9.0.320See vendor advisory
.NET 9.0 installed on Mac OSMicrosoftaffected: 9.0.0 to < 9.0.320See vendor advisory
.NET 9.0 installed on WindowsMicrosoftaffected: 9.0.0 to < 9.0.320See vendor advisory
.NET source-build Linux tarballs (all archive types)Microsoftaffected: 8.0.100 to < 10.0.403-servicing.26523.112See vendor advisory
ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published)Microsoftaffected: 8.0.0 to < 9.0.22See vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-10-31 23:57 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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