CVE-2026-44594

CVE-2026-44594 describes a Local File Inclusion (LFI) in esm.sh’s esbuild plugin handling of the browser field in package.json. The vulnerability allows an attacker to publish a crafted npm package that, during the build, causes the server to read and return arbitrary files from the host filesyst...

CVE-2026-44594 esm.sh: Path Traversal via package.json browser field allows reading arbitrary server files

esm.sh is a no-build content delivery network CDN for web development. In 137 and earlier, a Local File Inclusion LFI vulnerability exists in the esbuild plugin's handling of the browser field in package.json. An attacker can publish an npm package that causes the server to read and return...