CVE-2025-65025: esm.sh is a nobuild content delivery network(CDN) for modern web development

Q: How do I fix CVE-2025-65025?

esm.sh: upgrade to 136. Exact commands for each OS are on this page.

Q: Is CVE-2025-65025 being exploited?

CVE-2025-65025 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-65025 affect?

CVE-2025-65025 affects esm.sh. Severity is high (CVSS 8.2). 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

Q: How urgent is CVE-2025-65025?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTEUPGRADE

CVE-2025-65025 is a high-severity flaw (CVSS 8.2) affecting esm.sh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 extra

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-22
Published	2025-11-19
Last modified	2026-10-18

Publisher (CNA): GitHub, Inc. · Vendor: esm

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-19 18:15 UTCPublished CVE record published
2026-10-18 20:10 UTCUpdated Record last modified

esm esm.sh UPGRADE

Affected: < 136

Fixed in: 136

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy esm.sh || rpm -q esm.sh || esm.sh --version

2. UPGRADE to 136 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade esm.sh

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade esm.sh

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-65025?

esm.sh: upgrade to 136. Exact commands for each OS are on this page.

Is CVE-2025-65025 being exploited?

CVE-2025-65025 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-65025 affect?

CVE-2025-65025 affects esm.sh. Severity is high (CVSS 8.2). 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

How urgent is CVE-2025-65025?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

npm packages vulnerabilities

Related CVEs

CVE-2025-65026 MEDIUM 6.1 UPGRADE esm.sh is a nobuild content delivery network(CDN) for modern web development
CVE-2026-27730 HIGH 7.5 UPGRADE esm.sh is a no-build content delivery network (CDN) for web development
CVE-2026-23644 HIGH 7.5 UPGRADE esm.sh is a no-build content delivery network (CDN) for web development
CVE-2025-50180 HIGH 7.5 UPGRADE esm.sh is a no-build content delivery network (CDN) for web development

References

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