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Oct 16 2025 Microsoft kills 9.9-rated ASP.NET Core bug – 'our highest ever' score

Source

Flaw in Kestrel web server allowed request smuggling, impact depends on hosting setup and application code Microsoft has patched an ASP.NET Core vulnerability with a CVSS score of 9.9, which security program manager Barry Dorrans said was "our highest ever." The flaw is in the Kestrel web server component and enables security bypass.... [...]

Posted by Tim Anderson on Thu 16 October 2025 in The Register.

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