CVE-2025-50180

HIGH EPSS 29.9%
Published Feb 25, 20264mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Feb 25, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
29.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

Affected Products 1

VendorProductVersionRange
esmesm.sh* <137

References 6

  • github.com https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.go#L13
    Patch
  • github.com https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.go#L511
    Patch
  • github.com https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0
    Patch
  • github.com https://github.com/esm-dev/esm.sh/pull/1149
    Issue TrackingPatch
  • github.com https://github.com/esm-dev/esm.sh/releases/tag/v137
    ProductRelease Notes
  • github.com https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4
    ExploitMitigationPatchVendor Advisory

Remediation

  • github.com https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/internal/fetch/fetch.go#L13
    Patch
  • github.com https://github.com/esm-dev/esm.sh/blob/f80ff8c8d58749e77fa964abde468fc61f8bd89e/server/router.go#L511
    Patch
  • github.com https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0
    Patch
  • github.com https://github.com/esm-dev/esm.sh/pull/1149
    Issue TrackingPatch
  • github.com https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4
    ExploitMitigationPatchVendor Advisory