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CVE-2026-44594

7.5 · HIGH

esm.sh is a no-build content delivery network (CDN) for web development.

Published May 28, 2026CWE-22EPSS 0.48%

Overview

CVE-2026-44594 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57GitHubgithub.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57

How CyberStrike helps

Frequently asked questions

What is CVE-2026-44594?

CVE-2026-44594 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-44594?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-44594?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-44594?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-44594 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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