What is CVE-2025-65026?

CVE-2025-65026 is a medium-severity vulnerability in Esm-dev Esm.sh, classified under Code Injection. CVSS score: 6.1/10. Published 2025-11-19.

How severe is CVE-2025-65026?

Medium severity. CVSS v3 base score is 6.1 out of 10.

RCE in Esm-dev Esm.sh

CVE-2025-65026

esm.sh is a nobuild content delivery network(CDN) for modern web development. Prior to version 136, The esm.sh CDN service contains a Template Literal Injection vulnerability (CWE-94) in its CSS-to-JavaScript module conversion feature. Whe…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.000 (6.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Esm-dev Esm.sh — versions < 136

Weakness classification (CWE)

CWE-94 — Code Injection

References

https://github.com/esm-dev/esm.sh/security/advisories/GHSA-hcpf-qv9m-vfgp (x_refsource_CONFIRM)
https://github.com/esm-dev/esm.sh/commit/87d2f6497574bf4448641a5527a3ac2beba5fd6c (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-65026?: CVE-2025-65026 is a medium-severity vulnerability in Esm-dev Esm.sh, classified under Code Injection. CVSS score: 6.1/10. Published 2025-11-19.
How severe is CVE-2025-65026?: Medium severity. CVSS v3 base score is 6.1 out of 10.