CVE-2025-50180
esm.sh is vulnerable to full-response SSRF
- State
- Published
- Severity
- 8.7 High
- Published
- Feb 25, 2026
- Updated
- Feb 27, 2026
- Reserved
- Jun 13, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
esm.shesm-dev |
|
References
- https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4
- https://github.com/esm-dev/esm.sh/pull/1149
- https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0
- https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.go#L13
- https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.go#L511
- https://github.com/esm-dev/esm.sh/releases/tag/v137
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