CVEs / CVE-2026-114148

CVE-2026-114148: Microsoft .NET 10.0 installed on Linux vulnerability

high 7.8 CVSS 3.1 (from the CNA)
EPSS 0.35% chance of exploitation in the next 30 days, higher than 29% of CVEs (30 Oct 2026)
Last changed at its sources 30 Oct 2026

Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.

Check your servers with Stackurity Already using Stackurity? Search for CVE-2026-114148

Description

Incorrect default permissions in ASP.NET Core allows an authorized attacker to elevate privileges locally.
The CVE record, via NVD · published 29 Oct 2026 · NVD status: Awaiting Analysis

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Microsoft .NET 10.0 installed on Linux	from 10.0.0, before 10.0.403	10.0.403
Microsoft .NET 10.0 installed on Mac OS	from 10.0.0, before 10.0.403	10.0.403
Microsoft .NET 10.0 installed on Windows	from 10.0.0, before 10.0.403	10.0.403
Microsoft .NET 11.0 installed on Linux	from 11.0.0-preview.1, before 11.0.100-rc.3	11.0.100-rc.3
Microsoft .NET 11.0 installed on Mac OS	from 11.0.0-preview.1, before 11.0.100-rc.3	11.0.100-rc.3
Microsoft .NET 11.0 installed on Windows	from 11.0.0-preview.1, before 11.0.100-rc.3	11.0.100-rc.3
Microsoft .NET 8.0 installed on Linux	from 8.0.0, before 8.0.427	8.0.427
Microsoft .NET 8.0 installed on Mac OS	from 8.0.0, before 8.0.427	8.0.427
Microsoft .NET 8.0 installed on Windows	from 8.0.0, before 8.0.427	8.0.427
Microsoft .NET 9.0 installed on Linux	from 9.0.0, before 9.0.320	9.0.320
Microsoft .NET 9.0 installed on Mac OS	from 9.0.0, before 9.0.320	9.0.320
Microsoft .NET 9.0 installed on Windows	from 9.0.0, before 9.0.320	9.0.320
Microsoft .NET source-build Linux tarballs (all archive types)	from 8.0.100, before 10.0.403-servicing.26523.112	10.0.403-servicing.26523.112
Microsoft ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published)	from 8.0.0, before 9.0.22	9.0.22

Exploitation

Not in the CISA Known Exploited Vulnerabilities catalog as of 30 Oct 2026.

Severity

CVSS 3.1	7.8 high `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` Scored by the CNA ([email protected])
Weakness	CWE-276

On the Stackurity blog

Ubuntu USN-8958-1 fixes three .NET flaws, one exploited 30 Oct 2026

References

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.