CVE-2026-49030pathe through 2.0.3 unconditionally normalizes backslash characters to forward slashes on all platforms, including POSIX systems where backslash is a valid filename character. This causes join(), resolve(), and normalize() to interpret backslash-separated dot notation sequences as directory traversal, diverging from Node.js path.posix behavior and enabling path traversal attacks that bypass common input validation in server-side applications. NOTE: the Supplier reports that "the behavior is documented, intentional, and identical in spirit to path.win32."