GHSA-2657-3C98-63JQ esm.sh has a path traversal in extractPackageTarball enables file writes from malicious packages

Summary The commit does not actually fix the path traversal bug. path.Clean basically normalizes a path but does not prevent absolute paths in a malicious tar file. PoC This test file can demonstrate the basic idea pretty easily: go package server import "archive/tar" "bytes" "compress/gzip"...

Improper File Integrity Verification

yarn is vulnerable to improper file integrity verification. The vulnerability exists as it does not verify the integrity of cached packages...