Charmbracelet wish before 2.0.5 contains a path traversal vulnerability in the git middleware…

Why it is Yellow

• CVSS 8.1 high

References

• https://github.com/charmbracelet/wish/commit/533db0daa90446b0d4ae3284877179c37e0cc48e
• https://github.com/charmbracelet/wish/releases/tag/v2.0.5
• https://www.vulncheck.com/advisories/charmbracelet-wish-path-traversal-via-git-middleware

Original description

Charmbracelet wish before 2.0.5 contains a path traversal vulnerability in the git middleware (charm.land/wish/v2) that allows authenticated SSH users to escape the configured repository directory by supplying crafted repo paths that bypass a flawed forward-slash-count containment check in git.Middleware(). Attackers can use a single-depth path ../evil, or on Windows a payload ..\..\evil that defeats the slash-count guard entirely, to read or write arbitrary repositories outside the intended root via git-upload-pack, git-upload-archive, or git-receive-pack.