Improper Handling of Missing Special Element Affecting dotnet9-runtime package, versions <9.0.13-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-ALPINE321-DOTNET9RUNTIME-15325550
  • published21 Feb 2026
  • disclosed10 Feb 2026

Introduced: 10 Feb 2026

NewCVE-2026-21218  (opens in a new tab)
CWE-166  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 dotnet9-runtime to version 9.0.13-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dotnet9-runtime package and not the dotnet9-runtime package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

Improper handling of missing special element in .NET allows an unauthorized attacker to perform spoofing over a network.

CVSS Base Scores

version 3.1