High severity · published Feb 25, 2026
CVE-2025-50180
esm.sh is vulnerable to full-response SSRF
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
esm.sh · esm-dev
= 136 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-50180
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-50180
Patch
https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.go#L13
Patch
https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.go#L511
Patch
https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0
Issue Tracking
https://github.com/esm-dev/esm.sh/pull/1149
Product
https://github.com/esm-dev/esm.sh/releases/tag/v137
Exploit
https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4
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