CVE-2026-63478 isomorphic-git: Path traversal via a ".." tree-entry name writes files outside the working directory on clone/checkout

isomorphic-git is a pure JavaScript implementation of Git for Node.js and browsers. Prior to 1.38.6, isomorphic-git's tree parser in src/models/GitTree.js accepts a standalone .. tree-entry name because it rejects only path separators. During clone or checkout from a malicious or...