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High, CVSS 7.5amended

Microsoft Security Advisory CVE-2026-114155 - .NET Elevation of Privilege Vulnerability

CVE-2026-114155GHSA-q7j6-px74-p2vw

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (microsoft.dotnet.hotreload.watch.aspire 11.0.100, 10.0.404), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in the .NET SDK's dotnet-watch component. This advisory provides guidance on updating affected SDK installations. A local attacker who can replace or modify a temporary solution file used by dotnet-watch can alter a subsequent build. The fix stores generated solution files in a private temporary directory and keeps each file open with read-only sharing while the build uses it.

Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/502

CVSS Details - Version: 3.1 - Severity: High - Score: 7.5 (base score) - Vector: `CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C` - Weakness: CWE-367 - MSRC severity: Important - Impact: Elevation of Privilege

Affected Platforms - Platforms: Linux, macOS. - Architectures: Linux: Arm, Arm64, x64; macOS: Arm64, x64 Windows is outside this…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from osv record GHSA-q7j6-px74-p2vw

  2. Revision 1 · created ·

    Published from ghsa record GHSA-q7j6-px74-p2vw

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-114155

Advisory: Microsoft Security Advisory CVE-2026-114155 - .NET Elevation of Privilege Vulnerability
IDs: CVE-2026-114155, GHSA-q7j6-px74-p2vw
Record: https://patchnext.com/advisories/cve-2026-114155 (revision 2, source checked 11 Nov 2026, 07:45 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: microsoft.dotnet.hotreload.watch.aspire 11.0.100, 10.0.404. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet microsoft.dotnet.hotreload.watch.aspire: affected >= 10.0.300, < 10.0.404; >= 10.0.400, < 10.0.404; >= 11.0.100-preview.3.26207.106, < 11.0.100; fixed in 10.0.404, 11.0.100

## Suggested inspection (read-only)
- NuGet microsoft.dotnet.hotreload.watch.aspire: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on microsoft.dotnet.hotreload.watch.aspire.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-q7j6-px74-p2vw (GitHub-reviewed advisory GHSA-q7j6-px74-p2vw lists affected ranges: NuGet microsoft.dotnet.hotreload.watch.aspire >=10.0.300 =10.0.400 =11.0.100-preview.3.26207.106 <=11.0.100-rc.3.26522.148)
- Verified: https://osv.dev/vulnerability/GHSA-q7j6-px74-p2vw (OSV record GHSA-q7j6-px74-p2vw lists affected ranges: NuGet microsoft.dotnet.hotreload.watch.aspire >=10.0.300 =10.0.400 =11.0.100-preview.3.26207.106 <11.0.100 (fixed))

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