Insertion of Sensitive Information Into Sent Data Affecting microsoft.netcore.app.runtime.win-x86 package, versions [8.0.0,8.0.32)[9.0.0,9.0.21)[10.0.0,10.0.13)[11.0.0-preview.1,11.0.0-rc.2)
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-MICROSOFTNETCOREAPPRUNTIMEWINX86-20930976
- published14 Oct 2026
- disclosed13 Oct 2026
- creditKy0toFu, jhanks, Lucas Futures, Wenhan Zhou, Weeraphat Srisutham, Brent Woodard, Kevin Schmidt, Piotr Pietruszewski, Leandro Batista, Raffaello Tamagnini, Harkenzo, Attila.Cs, l8BL, caveeroo
Introduced: 13 Oct 2026
NewCVE-2026-66822 (opens in a new tab)How to fix?
Upgrade Microsoft.NETCore.App.Runtime.win-x86 to version 8.0.32, 9.0.21, 10.0.13, 11.0.0-rc.2 or higher.
Overview
Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the SocketsHttpHandler process. An attacker can obtain sensitive proxy credentials by causing an HTTP redirect that results in the Proxy-Authorization header being sent to an unintended destination server.