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Active filters (1):Package: pkg:golang/internal/syscall/windows

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CVE-2026-56857 is a vulnerability in the Go standard library's os package affecting Windows systems. It involves insecure operations on Windows junctions or mount points during directory creation. Specifically, when Root.Mkdir or Root.MkdirAll targets a junction pointing to an empty location, a directory can be created at the junction target even if it lies outside the intended root directory. This issue only occurs when the last path component is a junction, not for nested paths beyond the junction. The vulnerability affects Go versions from 0 up to but excluding 1.26.9, and from 1.27.0 up to but excluding 1.27.2.

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NewNTUnicodeString does not check for string length overflow. When provided with a string that overflows the maximum size of a NTUnicodeString (a 16-bit number of bytes), it returns a truncated string rather than an error.

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