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Fencer Vulns
high 7.0

CVE-2026-50526 json

.NET Tampering Vulnerability

published 2026-07-14 3 mo ago modified 2026-11-01 7 d ago also BIT-dotnet-2026-50526 , BIT-dotnet-sdk-2026-50526 , EUVD-2026-44394 , GHSA-55jh-fwmh-39m4

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally.

Patch / fix

  • nuget Microsoft.NET.Build.Containers 8.0.29, 9.0.18, 10.0.10
  • bitnami dotnet 8.0.29, 9.0.18, 10.0.6
  • bitnami dotnet-sdk 8.0.29, 9.0.18, 10.0.6
  • Microsoft .NET 10.0 runtime 10.0.10
  • Microsoft .NET 8.0 runtime 8.0.29
  • Microsoft .NET 9.0 runtime 9.0.18
  • Microsoft Microsoft Visual Studio 2022 version 17.12 17.12.22
  • Microsoft Microsoft Visual Studio 2022 version 17.14 17.14.36
  • Microsoft Microsoft Visual Studio 2026 version 18.7 18.7.4
  • dotnet8 Ubuntu 22.04 LTS 8.0.129-8.0.29-0ubuntu1~22.04.1
  • dotnet8 Ubuntu 24.04 LTS 8.0.129-8.0.29-0ubuntu1~24.04.1
  • dotnet10 Ubuntu 24.04 LTS 10.0.110-10.0.10-0ubuntu1~24.04.1
  • dotnet10 Ubuntu 26.04 LTS 10.0.110-10.0.10-0ubuntu1~26.04.1

ubuntu advisories UBUNTU-CVE-2026-50526

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dotnet8.0 hummingbird 1 8.0.129-2.1.hum1
  • dotnet-sdk-8.0 hummingbird 1 8.0.129-2.1.hum1
  • dotnet-hostfxr-8.0 hummingbird 1 8.0.29-2.1.hum1
  • dotnet-runtime-8.0 hummingbird 1 8.0.29-2.1.hum1
  • dotnet-sdk-dbg-8.0 hummingbird 1 8.0.129-2.1.hum1
  • dotnet-templates-8.0 hummingbird 1 8.0.129-2.1.hum1
  • aspnetcore-runtime-8.0 hummingbird 1 8.0.29-2.1.hum1
  • dotnet-runtime-dbg-8.0 hummingbird 1 8.0.29-2.1.hum1

red hat advisories RHSA-2026:58570RHSA-2026:58568RHSA-2026:58569RHSA-2026:58567RHSA-2026:58566RHSA-2026:42145

  • dotnet-sdk-8.0 AlmaLinux 10 8.0.129-1.el10_2
  • dotnet-hostfxr-8.0 AlmaLinux 10 8.0.29-1.el10_2
  • dotnet-runtime-8.0 AlmaLinux 10 8.0.29-1.el10_2
  • dotnet-sdk-dbg-8.0 AlmaLinux 10 8.0.129-1.el10_2
  • dotnet-templates-8.0 AlmaLinux 10 8.0.129-1.el10_2
  • aspnetcore-runtime-8.0 AlmaLinux 10 8.0.29-1.el10_2
  • dotnet-runtime-dbg-8.0 AlmaLinux 10 8.0.29-1.el10_2
  • dotnet-apphost-pack-8.0 AlmaLinux 10 8.0.29-1.el10_2

almalinux advisories ALSA-2026:41893ALSA-2026:41894ALSA-2026:41895ALSA-2026:41896ALSA-2026:41897ALSA-2026:41898

  • dotnet8.0 Rocky Linux 10 8.0.129-1.el10_2
  • dotnet9.0 Rocky Linux 10 9.0.119-1.el10_2
  • dotnet10.0 Rocky Linux 10 10.0.110-1.el10_2
  • dotnet8.0 Rocky Linux 9 8.0.129-1.el9_8
  • dotnet9.0 Rocky Linux 9 9.0.119-1.el9_8
  • dotnet10.0 Rocky Linux 9 10.0.110-1.el9_8
  • dotnet9.0 Rocky Linux 8 9.0.119-1.el8_10
  • dotnet10.0 Rocky Linux 8 10.0.110-1.el8_10

rocky linux advisories RLSA-2026:41893RLSA-2026:41895RLSA-2026:41897RLSA-2026:41894RLSA-2026:41896RLSA-2026:41898

  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.29-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 9.0.18-r0
  • dotnet10-runtime Alpine 3.24, Alpine 3.23 10.0.10-r0

alpine advisories ALPINE-CVE-2026-50526

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-2026-50526 updated cvss 7.0

dotnet: .NET: Local tampering via improper link resolution

  • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-8.0-source-built-artifacts 8.0.130-1.el9_6, dotnet-sdk-9.0-source-built-artifacts 9.0.120-1.el9_6
    fixed: vendor fix RHSA-2026:58569
  • Red Hat Enterprise Linux AppStream (v. 8) dotnet 10.0.110-1.el8_10, dotnet8.0 8.0.129-1.el8_10, dotnet9.0 9.0.119-1.el8_10, dotnet-host 10.0.10-1.el8_10, dotnet10.0 10.0.110-1.el8_10, dotnet-sdk-8.0 8.0.129-1.el8_10, +35 more
    fixed: vendor fix RHSA-2026:41900
  • Red Hat Enterprise Linux AppStream (v. 9) dotnet8.0 8.0.129-1.el9_8, dotnet9.0 9.0.119-1.el9_8, dotnet-host 10.0.10-1.el9_8, dotnet10.0 10.0.110-1.el9_8, dotnet-sdk-8.0 8.0.129-1.el9_8, dotnet-sdk-9.0 9.0.119-1.el9_8, +34 more
    fixed: vendor fix RHSA-2026:41898
  • Red Hat Enterprise Linux AppStream (v. 10) dotnet8.0 8.0.129-1.el10_2, dotnet9.0 9.0.119-1.el10_2, dotnet-host 10.0.10-1.el10_2, dotnet10.0 10.0.110-1.el10_2, dotnet-sdk-8.0 8.0.129-1.el10_2, dotnet-sdk-9.0 9.0.119-1.el10_2, +34 more
    fixed: vendor fix RHSA-2026:41897
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) dotnet8.0 8.0.130-1.el9_4, dotnet-host 8.0.30-1.el9_4, dotnet-sdk-8.0 8.0.130-1.el9_4, dotnet-hostfxr-8.0 8.0.30-1.el9_4, dotnet-runtime-8.0 8.0.30-1.el9_4, dotnet-sdk-dbg-8.0 8.0.130-1.el9_4, +8 more
    fixed: vendor fix RHSA-2026:58568
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) dotnet8.0 8.0.130-1.el10_0, dotnet9.0 9.0.120-1.el10_0, dotnet-host 9.0.19-1.el10_0, dotnet-sdk-8.0 8.0.130-1.el10_0, dotnet-sdk-9.0 9.0.120-1.el10_0, dotnet-hostfxr-8.0 8.0.30-1.el10_0, +21 more
    fixed: vendor fix RHSA-2026:58566
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) dotnet8.0 8.0.130-1.el9_6, dotnet9.0 9.0.120-1.el9_6, dotnet-host 9.0.19-1.el9_6, dotnet-sdk-8.0 8.0.130-1.el9_6, dotnet-sdk-9.0 9.0.120-1.el9_6, dotnet-hostfxr-8.0 8.0.30-1.el9_6, +21 more
    fixed: vendor fix RHSA-2026:58569
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-8.0-source-built-artifacts 8.0.129-1.el9_8, dotnet-sdk-9.0-source-built-artifacts 9.0.119-1.el9_8, dotnet-sdk-10.0-source-built-artifacts 10.0.110-1.el9_8
    fixed: vendor fix RHSA-2026:41898
show 5 more
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-8.0-source-built-artifacts 8.0.129-1.el10_2, dotnet-sdk-9.0-source-built-artifacts 9.0.119-1.el10_2, dotnet-sdk-10.0-source-built-artifacts 10.0.110-1.el10_2
    fixed: vendor fix RHSA-2026:41897
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-8.0-source-built-artifacts 8.0.130-1.el10_0, dotnet-sdk-9.0-source-built-artifacts 9.0.120-1.el10_0
    fixed: vendor fix RHSA-2026:58566
  • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-8.0-source-built-artifacts 8.0.129-1.el8_10, dotnet-sdk-9.0-source-built-artifacts 9.0.119-1.el8_10, dotnet-sdk-10.0-source-built-artifacts 10.0.110-1.el8_10
    fixed: vendor fix RHSA-2026:41900
  • Red Hat Hardened Images dotnet9.0 9.0.118-1.hum1, dotnet10.0 10.0.109-1.hum1, dotnet8.0 8.0.129-2.1.hum1, dotnet-sdk-9.0 9.0.118-1.hum1, dotnet-sdk-10.0 10.0.109-1.hum1, dotnet-sdk-8.0 8.0.129-2.1.hum1, +12 more
    fixed: vendor fix RHSA-2026:26638
  • Red Hat Hardened Images dotnet-host 10.0.9-1.hum1, dotnet-hostfxr-9.0 9.0.17-1.hum1, dotnet-runtime-9.0 9.0.17-1.hum1, dotnet-hostfxr-10.0 10.0.9-1.hum1, dotnet-runtime-10.0 10.0.9-1.hum1, dotnet-hostfxr-8.0 8.0.29-2.1.hum1, +19 more Red Hat OpenShift Dev Spaces devspaces/udi-rhel9
    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
total
Assessed
3 mo ago

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
GitHub 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
OSV 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.NET.Build.Containers
>=10.0.0, <10.0.10
>=9.0.0, <9.0.18
>=8.0.0, <8.0.29
10.0.10
9.0.18
8.0.29
bitnami dotnet
>=8.0.0, <8.0.29
>=9.0.0, <9.0.18
>=10.0.0, <10.0.6
8.0.29
9.0.18
10.0.6
bitnami dotnet-sdk
>=8.0.0, <8.0.29
>=9.0.0, <9.0.18
>=10.0.0, <10.0.6
8.0.29
9.0.18
10.0.6

Affected products

  • Microsoft .NET 10.0 runtime
  • Microsoft .NET 8.0 runtime
  • Microsoft .NET 9.0 runtime
  • Microsoft Microsoft Visual Studio 2022 version 17.12
  • Microsoft Microsoft Visual Studio 2022 version 17.14
  • Microsoft Microsoft Visual Studio 2026 version 18.7

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access
  • CWE-345 Insufficient Verification of Data Authenticity

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.