7.5

CVE-2026-44594: esm-dev esm.sh Path Traversal

CVSS: 7.5v3.1HighDeferred
AliasesGHSA-rg65-45m7-hq57GO-2026-5620
Published 28-05-2026Last modified 28-05-2026
Open JSON

Vulnerability summary

CVE-2026-44594 is a high (CVSS 7.5) Path Traversal vulnerability in esm-dev esm.sh. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21483-1

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 28-05-2026
    Last modifiedVulnerability information updated.

Description

esm.sh is a no-build content delivery network (CDN) for web development. In 137 and earlier, a Local File Inclusion (LFI) vulnerability exists in the esbuild plugin's handling of the browser field in package.json. An attacker can publish an npm package that causes the server to read and return arbitrary files from the host filesystem during the build process.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

+0.16 pp

From 0.32% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Esm-dev1 product
Github.com/esm-dev1 product
  • esm.sh< 0.0.0-20250616164159-0593516c4cfa

2 vendors · 2 products

References

4 links