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.
References (6)
Core 6
Core References
Vendor Advisory x_refsource_confirm
https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4
Issue Tracking x_refsource_misc
https://github.com/esm-dev/esm.sh/pull/1149
Patch x_refsource_misc
https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0
Third Party Advisory x_refsource_misc
https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.go#L13
Third Party Advisory x_refsource_misc
https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.go#L511
Release Notes x_refsource_misc
https://github.com/esm-dev/esm.sh/releases/tag/v137
Scores
CVSS v3
7.5
EPSS
0.0006
EPSS Percentile
19.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-918
Status
published
Products (2)
esm/esm.sh
< 137
esm-dev/esm.sh
0 - 0.0.0-20250616164159-0593516c4cfaGo
Published
Feb 25, 2026
Tracked Since
Feb 25, 2026