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Fencer Vulns
medium 4.3

CVE-2026-32175 json

.NET Core Tampering Vulnerability

published 2026-05-12 5 mo ago modified 2026-09-08 2 mo ago also BIT-dotnet-2026-32175 , BIT-dotnet-sdk-2026-32175 , EUVD-2026-29571 , GHSA-rg75-q538-x34v

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker who successfully exploited this vulnerability could write arbitrary files and directories to certain locations on a vulnerable system. However, an attacker would have limited control over the destination of the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles files.

Patch / fix

  • nuget Microsoft.NetCore.App.Runtime.win-arm 8.0.27, 9.0.16, 10.0.8
  • nuget Microsoft.NetCore.App.Runtime.win-arm64 8.0.27, 9.0.16, 10.0.8
  • nuget Microsoft.NetCore.App.Runtime.win-x64 8.0.27, 9.0.16, 10.0.8
  • nuget Microsoft.NetCore.App.Runtime.win-x86 8.0.27, 9.0.16, 10.0.8
  • bitnami dotnet 8.0.27, 9.0.16
  • bitnami dotnet-sdk 8.0.27, 9.0.16
  • Microsoft .NET 10.0 10.0.8
  • Microsoft .NET 8.0 8.0.27
  • Microsoft .NET 9.0 9.0.16
  • Microsoft Microsoft Visual Studio 2022 version 17.12 17.12.20
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.32
  • Microsoft Microsoft Visual Studio 2026 version 18.5 18.5.3
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 8.0.27-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 9.0.16-r0
  • dotnet10-runtime Alpine 3.24, Alpine 3.23 10.0.8-r0

alpine advisories ALPINE-CVE-2026-32175

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-32175 updated cvss 4.3

dotnet: .NET: improper handling of files allows an attacker to write to certain locations

  • Red Hat Enterprise Linux 8 dotnet, dotnet8.0, dotnet9.0, dotnet10.0, dotnet-host, dotnet-sdk-8.0, +38 more Red Hat Enterprise Linux 9 dotnet8.0, dotnet9.0, dotnet10.0, dotnet-host, dotnet-sdk-8.0, dotnet-sdk-9.0, +37 more Red Hat Enterprise Linux 10 dotnet8.0, dotnet9.0, dotnet10.0 Red Hat Hardened Images dotnet8.0, dotnet9.0, dotnet10.0
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
nuget Microsoft.NetCore.App.Runtime.win-arm
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
nuget Microsoft.NetCore.App.Runtime.win-arm64
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
nuget Microsoft.NetCore.App.Runtime.win-x64
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
nuget Microsoft.NetCore.App.Runtime.win-x86
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
>=10.0.0, <10.0.8
8.0.27
9.0.16
10.0.8
bitnami dotnet
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
8.0.27
9.0.16
bitnami dotnet-sdk
>=8.0.0, <8.0.27
>=9.0.0, <9.0.16
8.0.27
9.0.16

Affected products

  • Microsoft .NET 10.0
  • Microsoft .NET 8.0
  • Microsoft .NET 9.0
  • Microsoft Microsoft Visual Studio 2022 version 17.12
  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.5

Classification

Weakness
  • CWE-36 Absolute Path Traversal
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.