evolution-api through 2.3.7 Prometheus Metrics IP Allowlist Bypass

{
  "id": "f3e6531f24c16c94909fb982c569b94917b0c56f2d7df6b7fd7d2e798bd3da66",
  "url": "https://osv.dev/vulnerability/CVE-2026-91997",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "evolution-api through 2.3.7 Prometheus Metrics IP Allowlist Bypass",
    "summary": "evolution-api through 2.3.7 contains an incorrect array comparison in the metricsIPWhitelist middleware that always evaluates to false, allowing unauthenticated access to the /metrics endpoint. Attackers can bypass IP whitelist restrictions to access sensitive metrics disclosing server version, database client name, configured server URL, and WhatsApp instance details.",
    "evidence": "osv:CVE-2026-91997",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-91997",
      "aliases": [
        "CVE-2026-91997"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/evolution-foundation/evolution-api",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "cd800f2976e1e5b682fbf86a01ee4d85ae61f370"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.3.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.3.7"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.3.7",
            "2.3.6",
            "2.3.5",
            "2.3.4",
            "2.3.3",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.3",
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "2.2.0-pre",
            "1.0.7"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91997.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.237859057Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91997.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-91997",
        "https://www.vulncheck.com/advisories/evolution-api-through-2.3.7-prometheus-metrics-ip-allowlist-bypass",
        "https://github.com/evolution-foundation/evolution-api",
        "https://github.com/evolution-foundation/evolution-api/blob/2.3.7/src/api/routes/index.router.ts#L49-L65",
        "https://github.com/geo-chen/oss/blob/main/evolution-api.md"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-697"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91997.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-91997",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518930,
  "published_at": "2026-09-15T11:35:51.378+00:00"
}