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Fencer Intel
high 7.8

CVE-2026-45490 json

.NET SDK Elevation of Privilege Vulnerability

published 5mo ago modified last mo. also BIT-dotnet-2026-45490 , BIT-dotnet-sdk-2026-45490 , EUVD-2026-35674

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

Patch / fix

  • bitnami dotnet 8.0.28, 9.0.17, 10.0.9
  • bitnami dotnet-sdk 8.0.28, 9.0.17, 10.0.9
  • Microsoft .NET 10.0 10.0.9
  • Microsoft .NET 8.0 8.0.28
  • Microsoft .NET 9.0 9.0.17
  • dotnet8-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 8.0.28-r0
  • dotnet9-runtime Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 9.0.17-r0
  • dotnet10-runtime Alpine 3.24, Alpine 3.23 10.0.9-r0

alpine advisories ALPINE-CVE-2026-45490

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

Is CVE-2026-45490 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-45490 updated cvss 7.8

dotnet: .NET SDK workload elevate: arbitrary file creation/truncation via LogFile named pipe.

  • 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
total
Assessed
4mo ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami dotnet
>=8.0.0, <8.0.28
>=9.0.0, <9.0.17
>=10.0.0, <10.0.9
8.0.28
9.0.17
10.0.9
bitnami dotnet-sdk
>=8.0.0, <8.0.28
>=9.0.0, <9.0.17
>=10.0.0, <10.0.9
8.0.28
9.0.17
10.0.9

Affected products

  • Microsoft .NET 10.0
  • Microsoft .NET 8.0
  • Microsoft .NET 9.0
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Hardened Images

Classification

Weakness

References

Sources

Fencer Intel 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.