MicrosoftCVE-2026-62902

Microsoft .NET 8.0 runtime: protection mechanism failure

CVE-2026-62902 · Published Aug 11, 2026 · updated Oct 28, 2026

Medium6.5

Fix: upgrade to 8.0.30 or later (4 fixed versions below)

Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.

Affected versions

Package	Affected	Fixed in
.NET 8.0 runtime Product	>= 8.0.0, < 8.0.30	8.0.30
.NET 9.0 runtime Product	>= 9.0.0, < 9.0.19	9.0.19
Microsoft Visual Studio 2022 version 17.14 Product	>= 17.14.0, < 17.14.38	17.14.38
Microsoft Visual Studio 2026 version 18.8 Product	>= 18.0, < 18.8.3	18.8.3

Changes since it was listed

Fixed inNov 3Fixed in: .NET 8.0 8.0.30, .NET 9.0 9.0.19, Microsoft Visual Studio 2022 version 17.14 17.14.38 to .NET 8.0 runtime 8.0.30, .NET 9.0 runtime 9.0.19, Microsoft Visual Studio 2022 version 17.14 17.14.38

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-693, CWE-829, CWE-918

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