{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "echo",
          "vendor": "labstack",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 5.1.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Echo is a Go web framework. From 4.0.0 until 5.1.0, Context.RealIP falls back to client-supplied X-Forwarded-For or X-Real-IP values when Echo.IPExtractor is unset, and the default RateLimiter uses that result as its client identifier. A remote attacker can rotate arbitrary forwarded-address values to obtain new rate-limit buckets and bypass IP-based throttling used for controls such as brute-force or request-volume protection. This issue is fixed in Echo v5.1.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-290",
              "description": "CWE-290: Authentication Bypass by Spoofing",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T19:42:05.556Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/labstack/echo/security/advisories/GHSA-246p-cpwv-v3jq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/labstack/echo/security/advisories/GHSA-246p-cpwv-v3jq"
        },
        {
          "name": "https://github.com/labstack/echo/commit/22e4b71109ef072ef011a489066ec662ca9565b2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labstack/echo/commit/22e4b71109ef072ef011a489066ec662ca9565b2"
        },
        {
          "name": "https://github.com/labstack/echo/releases/tag/v5.1.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labstack/echo/releases/tag/v5.1.0"
        }
      ],
      "source": {
        "advisory": "GHSA-246p-cpwv-v3jq",
        "discovery": "UNKNOWN"
      },
      "title": "Echo: Rate Limiter Bypass via Spoofed X-Forwarded-For Header in Default Configuration"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118653",
    "datePublished": "2026-10-28T19:42:05.556Z",
    "dateReserved": "2026-10-28T17:25:37.561Z",
    "dateUpdated": "2026-10-28T19:42:05.556Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}