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. Commit https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16, corresponding to pseudoversion 0.0.0-20260116051925-c62ab83c589e, fixes this issue.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16	Patch
https://github.com/esm-dev/esm.sh/commit/c62ab83c589e7b421a0e1376d2a00a4e48161093	Patch
https://github.com/esm-dev/esm.sh/security/advisories/GHSA-2657-3c98-63jq	Vendor Advisory
https://pkg.go.dev/vuln/GO-2025-4138	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:esm:esm.sh:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-01-18 23:15

Updated : 2026-06-17 10:21

NVD link : CVE-2026-23644

Mitre link : CVE-2026-23644

CVE.ORG link : CVE-2026-23644

JSON object : View

Products Affected

esm

esm.sh

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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