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.
CVE-2025-65025
This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 8.2(medium)
- EG Risk
- —
- EPSS
- 42.1%
- KEV
- Not listed
Published
November 19, 2025
Last Modified
June 17, 2026
Advisory Details (2)
Auto-updated Jun 30, 2026Arbitrary file write via tarslip · Advisory · esm-dev/esm.sh · GitHub
https://github.com/esm-dev/esm.sh/security/advisories/GHSA-h3mw-4f23-gwpwcommit 9d77b88c3207 (esm-dev/esm.sh)
Patch available: esm-dev/esm.sh v137 (contains commit 9d77b88c3207)
https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/esm-dev/esm.sh | — | 0.0.0-20251117232647-9d77b88c3207 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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- 2026-06-24 09:59 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
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Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2025-65025?
When was CVE-2025-65025 disclosed?
Is CVE-2025-65025 actively exploited?
What is the CVSS score of CVE-2025-65025?
How do I remediate CVE-2025-65025?
Dependency Blast Radius
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