CVE-2026-44594
Published:May 28, 2026
Updated:June 13, 2026
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 arbitrary files from the host filesystem during the build process.
Affected Packages
https://github.com/esm-dev/esm.sh.git (GITHUB):
Affected version(s) >=v34 <v137_3Fix Suggestion:
Update to version v137_3github.com/esm-dev/esm.sh (GO):
Affected version(s) >=v0.0.0-20240514002037-19735e27aaf9 <v0.0.0-20250616164159-0593516c4cfaFix Suggestion:
Update to version v0.0.0-20250616164159-0593516c4cfagithub.com/esm-dev/esm.sh (GO):
Affected version(s) >=v0.0.0-20240514002037-19735e27aaf9 <v137_3Fix Suggestion:
Update to version v137_3Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS
Base Score:
0.06