CVE-2025-65026: esm.sh before 136 (exclusive), < 136

CVE-2025-65026. CVSS 3.1 base score 9.6 (CRITICAL, NVD). EPSS 0.0048 (percentile 0.40016), scored 17-Oct-2026.

Affected technology

esm.sh · before 136 (exclusive)
esm

esm.sh · < 136
esm-dev

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

An attacker can inject malicious JavaScript code using ${...} expressions within CSS files, which will execute when the module is imported by victim applications. Vendor/CNA’s CVSS 3.1 assessment (base score 6.1/10) rates confidentiality and integrity impact as low; availability impact as none. NVD’s CVSS 3.1 assessment (base score 9.6/10) rates confidentiality, integrity and availability impact as high.

Published 18-Oct-2026 20:24 UTC

CWE: CWE-79, CWE-94
CCR priority: 38.5 /100 (P4)
CVSS 3.1: 9.6 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H · NVD
EPSS: 0.0048 · percentile 0.40016 · 2026-10-17
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-18 20:23:06.032219+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2025-65026.html