CVE-2026-44593

esm.sh is a no-build content delivery network CDN for web development. In 137 and earlier, the legacy router first retrieves a response from legacyServer, parses the incoming request path, and ultimately writes the data to storage via buildStorage.Put. The router concatenates the path components...

CVE-2026-44593

esm.sh is a no-build content delivery network CDN for web development. In 137 and earlier, the legacy router first retrieves a response from legacyServer, parses the incoming request path, and ultimately writes the data to storage via buildStorage.Put. The router concatenates the path components...

EUVD-2026-32910

esm.sh is a no-build content delivery network CDN for web development. In 137 and earlier, the legacy router first retrieves a response from legacyServer, parses the incoming request path, and ultimately writes the data to storage via buildStorage.Put. The router concatenates the path components...

CVE-2026-44593

esm.sh is a no-build content delivery network CDN for web development. In 137 and earlier, the legacy router first retrieves a response from legacyServer, parses the incoming request path, and ultimately writes the data to storage via buildStorage.Put. The router concatenates the path components...

CVE-2026-44593 esm.sh: Legacy Route Path Traversal Can Lead to RCE

esm.sh is a no-build content delivery network CDN for web development. In 137 and earlier, the legacy router first retrieves a response from legacyServer, parses the incoming request path, and ultimately writes the data to storage via buildStorage.Put. The router concatenates the path components...

CVE-2026-44593

esm.sh (no-build CDN) vulnerable to path traversal in legacy_router.go. In versions up to 137, the router concatenates request path components without sanitization, generating a storage key that can resolve to arbitrary filesystem paths (example: writing to /tmp/pwned). This allows an attacker to...

GHSA-3636-H3VX-6465 esm.sh: Legacy Route Path Traversal Can Lead to RCE

Impact - Arbitrary File Write – An attacker can cause the server to write data to any file path it has write permission for. - Privilege Escalation / RCE – By overwriting critical binaries or scripts, the attacker can execute arbitrary code with the server’s privileges. Exploit The legacy router...

PT-2026-40542

Name of the Vulnerable Software and Affected Versions esm.sh versions 137 and earlier Description The legacy router retrieves a response from legacyServer, parses the request path, and writes data to storage using the buildStorage.Put function. Because the router concatenates path components...