UNKNOWN Go

Improper access to parent directory of root in os

GO-2026-4403 · BIT-golang-2025-22873 · CVE-2025-22873

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Description

It was possible to improperly access the parent directory of an os.Root by opening a filename ending in "../". For example, Root.Open("../") would open the parent directory of the Root. This escape only permits opening the parent directory itself, not ancestors of the parent or files contained within the parent.

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