CVE-2025-59342
Published: Sep 17, 2025
Modified: Jan 14, 2026
Description
esm.sh is a nobuild content delivery network(CDN) for modern web development. In 136 and earlier, a path-traversal flaw in the handling of the X-Zone-Id HTTP header allows an attacker to cause the application to write files outside the intended storage location. The header value is used to build a filesystem path but is not properly canonicalized or restricted to the application’s storage base directory. As a result, supplying ../ sequences in X-Zone-Id causes files to be written to arbitrary directories. Version 136.1 contains a patch.
| Vendor | Product | Versions |
|---|---|---|
esm-dev | esm.sh | affected <= 136 |
Weaknesses (CWE)
References
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