CVE-2025-50180

esm.sh is vulnerable to full-response SSRF

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.

Affected

esm-dev · esm.sh

CVSS v4.0 GITHUB

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v4.0 GitHub

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS v3.1 NVD

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

EPSS

0.40% chance of exploitation in the next 30 days, 32nd percentile

Published

2026-02-25

Updated

2026-02-27

Proof-of-concept exploits (1)

• advisories/GHSA-3c9r-837r-qqm4

Security advisories

• esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4
• esm-dev/esm.sh/pull/1149

References

• CVE Record
• NVD entry