CVE-2025-65025
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductEsm.sh
PublishedNov 19, 2025
First seenNov 19, 2025
Weakness typeCWE-22Path traversal
How to fix
Update
- esm esm.sh136 or later
- github.com/esm-dev/esm.sh0.0.0-20251117232647-9d77b88c3207 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| esm esm.sh | v < 136 | 136 |
| github.com/esm-dev/esm.shGo | v < 0.0.0-20251117232647-9d77b88c3207 | 0.0.0-20251117232647-9d77b88c3207 |
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