CVE-2025-50180

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

esm.sh is a no-build content delivery network (CDN) for web development. In version 136, esm.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Version 137 fixes the vulnerability.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
esm-dev	esm.sh	= 136

References

https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.go#L13Patch
https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.go#L511Patch
https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0Patch
https://github.com/esm-dev/esm.sh/pull/1149Issue Tracking, Patch
https://github.com/esm-dev/esm.sh/releases/tag/v137Product, Release Notes
https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4Exploit, Mitigation, Patch, Vendor Advisory

Timeline

Published: Feb 25, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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