esm.sh is vulnerable to full-response SSRF

{
  "id": "0f1809d166721074dd4a308de2ff775200ab88b69a9da72690cc927334f6d4f5",
  "url": "https://osv.dev/vulnerability/CVE-2025-50180",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "esm.sh is vulnerable to full-response SSRF",
    "summary": "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.",
    "evidence": "osv:CVE-2025-50180",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-50180",
      "aliases": [
        "CVE-2025-50180",
        "GHSA-3c9r-837r-qqm4",
        "GO-2026-4545"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/esm-dev/esm.sh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1ad31b6352bb0a064ece812f6f360e4850e16051"
                },
                {
                  "fixed": "0593516c4cfab49ad3b4900416a8432ff2e23eb0"
                },
                {
                  "fixed": "2ff321d847219cf2c8152efeea3a20a72ee80f64"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "= 136"
                      },
                      {
                        "last_affected": "= 136"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "0593516c4cfab49ad3b4900416a8432ff2e23eb0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2ff321d847219cf2c8152efeea3a20a72ee80f64"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v137"
                  }
                ]
              }
            }
          ],
          "versions": [
            "= 136",
            "v136"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-50180.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.289683817Z",
      "provider": "osv",
      "references": [
        "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",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/50xxx/CVE-2025-50180.json",
        "https://github.com/esm-dev/esm.sh/security/advisories/GHSA-3c9r-837r-qqm4",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-50180",
        "https://github.com/esm-dev/esm.sh/commit/0593516c4cfab49ad3b4900416a8432ff2e23eb0",
        "https://github.com/esm-dev/esm.sh/pull/1149"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/50xxx/CVE-2025-50180.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-50180",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498063,
  "published_at": "2026-02-25T15:32:56.449+00:00"
}