GHSA-qw64-3x98-g7q2

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GHSA-qw64-3x98-g7q2

Summary: go-billy has path traversal vulnerabilities

Details: ### Impact Multiple path traversal issues exist across different components of `go-billy`. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using `..`) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on `go-billy` for some level of isolation may inadvertently expose access to unintended filesystem locations. The `osfs.ChrootOS` implementation is notably affected by this vulnerability and is now deprecated in `v5`, removed at `v6`. Users are recommended to move on to `osfs.BoundOS` instead: `osfs.New(path, WithBoundOS())`. Users requiring stronger security boundary enforcement are recommended to upgrade to `v6`, where the `osfs` implementation are backed by the [traversal-resistant](https://go.dev/blog/osroot) primitive [os.Root](https://pkg.go.dev/os#Root). ### Patches Users should upgrade to a patched version in order to mitigate this vulnerability. Versions prior to `v5` are likely to be affected, users are recommended to upgrade to a supported `go-billy` version. ### Credits Thanks to @faran66 and @vnykmshr for finding and separately reporting this issue privately to the go-git project. 🙇

References: https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2, https://nvd.nist.gov/vuln/detail/CVE-2026-44973, https://github.com/go-git/go-billy, https://github.com/go-git/go-billy/releases/tag/v5.9.0, https://github.com/go-git/go-billy/releases/tag/v6.0.0-alpha.1