HTTP Response Splitting Affecting microsoft.netcore.app.runtime.win-arm64 package, versions [8.0.0-preview.1.23110.8,8.0.26)[9.0.0-preview.1.24080.9,9.0.15)[10.0.0-preview.1.25080.5,10.0.6)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-MICROSOFTNETCOREAPPRUNTIMEWINARM64-16066633
- published15 Apr 2026
- disclosed14 Apr 2026
- creditLudvig Pedersen
Introduced: 14 Apr 2026
NewCVE-2026-32178 (opens in a new tab)How to fix?
Upgrade Microsoft.NETCore.App.Runtime.win-arm64 to version 8.0.26, 9.0.15, 10.0.6 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Response Splitting via the MailAddressParser.TryParseAddress() function due to improper neutralisation of CRLF sequences. An attacker can impersonate another user or entity by sending specially crafted data over the network.