GHSA-RG65-45M7-HQ57 esm.sh: Path Traversal via package.json browser field allows reading arbitrary server files

Summary 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 arbitrary files from the host filesystem during the build process. Details The vulnerable...

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...

SUSE CVE-2026-23644

esm.sh is a no-build content delivery network CDN for web development. Prior to Go pseeudoversion 0.0.0-20260116051925-c62ab83c589e, the software has a path traversal vulnerability due to an incomplete fix. path.Clean normalizes a path but does not prevent absolute paths in a malicious tar file...

GO-2026-4554 esm.sh has SSRF localhost/private-network bypass in `/http(s)` module route in github.com/esm-dev/esm.sh

esm.sh has SSRF localhost/private-network bypass in /https module route in github.com/esm-dev/esm.sh...

CVE-2026-27730

esm.sh is a no-build content delivery network CDN for web development. Versions up to and including 137 have an SSRF vulnerability CWE-918 in esm.sh’s /https fetch route. The service tries to block localhost/internal targets, but the validation is based on hostname string checks and can be bypass...

CVE-2026-27730 esm.sh has SSRF localhost/private-network bypass in `/http(s)` module route

esm.sh is a no-build content delivery network CDN for web development. Versions up to and including 137 have an SSRF vulnerability CWE-918 in esm.sh’s /https fetch route. The service tries to block localhost/internal targets, but the validation is based on hostname string checks and can be bypass...

CVE-2026-27730 esm.sh has SSRF localhost/private-network bypass in `/http(s)` module route

esm.sh is a no-build content delivery network CDN for web development. Versions up to and including 137 have an SSRF vulnerability CWE-918 in esm.sh’s /https fetch route. The service tries to block localhost/internal targets, but the validation is based on hostname string checks and can be bypass...

CVE-2026-27730

esm.sh (a no-build CDN for web development) versions up to and including 137 contain an SSRF (CWE-918) in the /http(s) fetch route. The service validates against localhost/internal targets using hostname string checks, which can be bypassed with DNS alias domains, allowing an external requester t...

CVE-2025-50180

esm.sh is a no-build content delivery network CDN for web development. In version 136, esm.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Version 137 fixes the vulnerability...

CVE-2025-50180 esm.sh is vulnerable to full-response SSRF

esm.sh is a no-build content delivery network CDN for web development. In version 136, esm.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Version 137 fixes the vulnerability...

CVE-2025-50180 esm.sh is vulnerable to full-response SSRF

esm.sh is a no-build content delivery network CDN for web development. In version 136, esm.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Version 137 fixes the vulnerability...

GHSA-3C9R-837R-QQM4 esm.sh is vulnerable to full-response SSRF

Summary esh.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Details Vulnerable code location: https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.goL511 If the intern...

CVE-2026-23644

esm.sh is a no-build content delivery network CDN for web development. Prior to Go pseeudoversion 0.0.0-20260116051925-c62ab83c589e, the software has a path traversal vulnerability due to an incomplete fix. path.Clean normalizes a path but does not prevent absolute paths in a malicious tar file...

SUSE CVE-2025-65025

esm.sh is a nobuild content delivery networkCDN for modern web development. Prior to version 136, the esm.sh CDN service is vulnerable to path traversal during NPM package tarball extraction. An attacker can craft a malicious NPM package containing specially crafted file paths e.g.,...

GO-2025-4138 esm.sh CDN service has arbitrary file write via tarslip in github.com/esm-dev/esm.sh

esm.sh CDN service has arbitrary file write via tarslip in github.com/esm-dev/esm.sh...

CVE-2025-65026

esm.sh is a nobuild content delivery networkCDN for modern web development. Prior to version 136, The esm.sh CDN service contains a Template Literal Injection vulnerability CWE-94 in its CSS-to-JavaScript module conversion feature. When a CSS file is requested with the ?module query parameter,...

CVE-2025-65025 esm.sh CDN service has arbitrary file write via tarslip

esm.sh is a nobuild content delivery networkCDN for modern web development. Prior to version 136, the esm.sh CDN service is vulnerable to path traversal during NPM package tarball extraction. An attacker can craft a malicious NPM package containing specially crafted file paths e.g.,...

Path Traversal

esm.sh is vulnerable to Path Traversal. The vulnerability is due to improper validation of the X-Zone-Id HTTP header when constructing filesystem paths, which allows an attacker to use ../ sequences to write files outside the intended storage directory and access arbitrary locations on the system...

CVE-2025-59341

esm.sh is a nobuild content delivery networkCDN for modern web development. In 136 and earlier, a Local File Inclusion LFI issue was identified in the esm.sh service URL handling. An attacker could craft a request that causes the server to read and return files from the host filesystem or other...

Exploit for CVE-2025-59342

CVE-2025-59342 - Path Traversal esm-dev Author: Byte Reape...