Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2026-45491

Improper Link Resolution Before File Access ('Link Following')

Published: Jun 09, 2026 | Modified: Jun 17, 2026
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
6.2 MODERATE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-45491
CWEhttps://cwe.mitre.org/data/definitions/59.html

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

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

NameVendorStart VersionEnd Version
.netMicrosoft8.0.0 (including)8.0.28 (excluding)
.netMicrosoft9.0.0 (including)9.0.17 (excluding)
.netMicrosoft10.0.0 (including)10.0.9 (excluding)
Red Hat Enterprise Linux 10RedHatdotnet8.0-0:8.0.128-1.el10_2*
Red Hat Enterprise Linux 10RedHatdotnet9.0-0:9.0.118-1.el10_2*
Red Hat Enterprise Linux 10RedHatdotnet10.0-0:10.0.109-1.el10_2*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatdotnet8.0-0:8.0.128-1.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatdotnet9.0-0:9.0.118-1.el10_0*
Red Hat Enterprise Linux 8RedHatdotnet8.0-0:8.0.128-1.el8_10*
Red Hat Enterprise Linux 8RedHatdotnet9.0-0:9.0.118-1.el8_10*
Red Hat Enterprise Linux 8RedHatdotnet10.0-0:10.0.109-1.el8_10*
Red Hat Enterprise Linux 9RedHatdotnet8.0-0:8.0.128-1.el9_8*
Red Hat Enterprise Linux 9RedHatdotnet9.0-0:9.0.118-1.el9_8*
Red Hat Enterprise Linux 9RedHatdotnet10.0-0:10.0.109-1.el9_8*
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRedHatdotnet8.0-0:8.0.128-1.el9_4*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatdotnet8.0-0:8.0.128-1.el9_6*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatdotnet9.0-0:9.0.118-1.el9_6*
Red Hat Hardened ImagesRedHatdotnet9-0-main-9.0.117-1.hum1*
Red Hat Hardened ImagesRedHatdotnet10-0-main-10.0.109-1.hum1*
Red Hat Hardened ImagesRedHatdotnet8-0-main-8.0.128-1.hum1*
Dotnet10Ubuntudevel*
Dotnet10Ubuntunoble*
Dotnet10Ubuntuquesting*
Dotnet10Ubunturesolute*
Dotnet7Ubuntujammy*
Dotnet8Ubuntujammy*
Dotnet8Ubuntunoble*
Dotnet8Ubuntuquesting*
Dotnet9Ubuntuquesting*

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References

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