CVE-2025-65025CRITICAL 9.8EPSS p38.7%

CVE-2025-65025CVE-2025-65025

Description

esm.sh is a nobuild content delivery network(CDN) 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., package/../../tmp/evil.js). When esm.sh downloads and extracts this package, files may be written to arbitrary locations on the server, escaping the intended extraction directory. This issue has been patched in version 136.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.50% probability of exploitation · percentile 38.7% · 2026-06-19T12:03:05Z
Published2025-11-19
Last modified2026-01-15

Underlying weaknesses· 1

CWE-22

References

  1. https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16
  2. https://github.com/esm-dev/esm.sh/security/advisories/GHSA-h3mw-4f23-gwpw
  3. https://github.com/esm-dev/esm.sh/security/advisories/GHSA-h3mw-4f23-gwpw

1

TypeTargetConfidenceTier
WeaknessImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-220%live

Related by meaning· 6

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.