What is CVE-2026-44594?

CVE-2026-44594 is a high-severity vulnerability in Esm-dev Esm.sh, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-05-28.

How severe is CVE-2026-44594?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Esm-dev Esm.sh

CVE-2026-44594

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 a…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.001 (18.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Esm-dev Esm.sh — versions <= 137

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44594?: CVE-2026-44594 is a high-severity vulnerability in Esm-dev Esm.sh, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-05-28.
How severe is CVE-2026-44594?: High severity. CVSS v3 base score is 7.5 out of 10.