Vulnerability DatabaseCVE-2026-45491
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CVE-2026-45491
Published:June 09, 2026
Updated:June 29, 2026
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Affected Packages
microsoft.netcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.linux-arm (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.linux-arm (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.linux-arm (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.win-arm (NUGET):
Affected version(s) >=8.0.0-preview.1.23110.8 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.linux-musl-arm (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.osx-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.linux-musl-arm (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.linux-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.linux-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.linux-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.linux-musl-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.linux-musl-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.linux-musl-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.osx-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.win-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.osx-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.linux-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.linux-musl-arm (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.linux-musl-x64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.win-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.linux-musl-arm64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.linux-musl-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.linux-arm64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.linux-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.osx-x64 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
microsoft.netcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.osx-arm64 (NUGET):
Affected version(s) >=10.0.0 <10.0.9
Fix Suggestion:
Update to version 10.0.9
microsoft.netcore.app.runtime.osx-x64 (NUGET):
Affected version(s) >=9.0.0 <9.0.17
Fix Suggestion:
Update to version 9.0.17
microsoft.netcore.app.runtime.win-x86 (NUGET):
Affected version(s) >=8.0.0 <8.0.28
Fix Suggestion:
Update to version 8.0.28
Related Resources (5)
https://github.com/dotnet/announcements/issues/404
https://nvd.nist.gov/vuln/detail/CVE-2026-45491
https://github.com/dotnet/runtime
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45491
https://github.com/dotnet/runtime/security/advisories/GHSA-7q4v-2mr6-5gpx
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CVSS v4
Base Score:
6.9
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.2
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Exploit Maturity
UNPROVEN
Weakness Type (CWE)
Improper Link Resolution Before File Access ('Link Following')
CWE-59
EPSS
Base Score:
0.39