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CVE-2025-65026

30
FAUCET Score

CVE-2025-65026 describes a Critical Template Literal Injection vulnerability (CWE-94) in the esm.sh CDN service, affecting versions prior to 136. An attacker can inject malicious JavaScript via specially crafted CSS files requested with the ?module parameter, leading to Cross-Site Scripting (XSS) in browsers and Remote Code Execution (RCE) in Electron applications. With a CVSS score of 9.6, this vulnerability is easily exploitable over the network with low attack complexity, requiring user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in the KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 136CPE matchmatch criteria
cpe:2.3:a:esm:esm.sh:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 43rd percentile among its peer group of 834 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/esm-dev/esm.shFixed in: 0.0.0-20251118065157-87d2f6497574

Vendor Advisories (1)

goGHSA-hcpf-qv9m-vfgpmedium

esm.sh CDN service has JS Template Literal Injection in CSS-to-JavaScript

Nov 19, 2025

References

github.com / esm-dev/esm.sh/commit/87d2f6497574bf4448641a5527a3ac2beba5fd6c
Patch
github.com / esm-dev/esm.sh/security/advisories/GHSA-hcpf-qv9m-vfgp
ExploitVendor Advisory