PT-2026-3403 · Esm.Sh · Esm.Sh

Kelbyludwig · Published 2026-01-18 · Updated 2026-03-03 · CVE-2026-23644

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions esm.sh versions prior to 0.0.0-20260116051925-c62ab83c589e

Description esm.sh is a content delivery network for web development. Versions prior to pseudoversion 0.0.0-20260116051925-c62ab83c589e contain a path traversal issue. The issue stems from an incomplete fix where path.Clean normalizes a path but does not prevent absolute paths within a malicious tar file.

Recommendations Update to version 0.0.0-20260116051925-c62ab83c589e or later.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-23644

GHSA-2657-3C98-63JQ

GO-2026-4332

SUSE-SU-2026:0757-1

Affected Products

Esm.Sh

References · 118

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23644.json · Exploit
• https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16 · Patch
• https://github.com/esm-dev/esm.sh/security/advisories/GHSA-2657-3c98-63jq · Vendor Advisory
• https://github.com/esm-dev/esm.sh/commit/c62ab83c589e7b421a0e1376d2a00a4e48161093 · Patch
• https://pkg.go.dev/vuln/GO-2025-4138 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-2657-3c98-63jq · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-4332 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23644 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23644 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:0757-1 · Vendor Advisory
• https://github.com/esm-dev/esm.sh · Note
• https://suse.com/security/cve/CVE-2026-27112 · Note
• https://suse.com/security/cve/CVE-2026-21434 · Note
• https://suse.com/security/cve/CVE-2025-14573 · Note
• https://suse.com/security/cve/CVE-2017-18912 · Note