{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "echo",
          "vendor": "labstack",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.4.0"
            },
            {
              "status": "affected",
              "version": "\u003c 4.16.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Context.Scheme unconditionally trusts forwarded scheme headers from any client. A client that reaches Echo directly over plaintext HTTP can claim an HTTPS scheme and bypass HTTPSRedirect because the request is treated as already secure. Separately, behind a TLS-terminating proxy that passes an attacker-controlled header, a claimed HTTP scheme can suppress the Strict-Transport-Security header even though the browser receives the response over HTTPS. The practical risk is reduced when a trusted proxy overwrites the headers and direct backend access is prevented, but the framework previously had no trusted-source configuration for this decision. This issue is fixed in 4.16.0 and 5.4.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T20:14:09.883Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/labstack/echo/security/advisories/GHSA-2ffq-g2xg-c22p",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/labstack/echo/security/advisories/GHSA-2ffq-g2xg-c22p"
        },
        {
          "name": "https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1"
        },
        {
          "name": "https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af"
        },
        {
          "name": "https://github.com/labstack/echo/releases/tag/v4.16.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labstack/echo/releases/tag/v4.16.0"
        },
        {
          "name": "https://github.com/labstack/echo/releases/tag/v5.4.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/labstack/echo/releases/tag/v5.4.0"
        }
      ],
      "source": {
        "advisory": "GHSA-2ffq-g2xg-c22p",
        "discovery": "UNKNOWN"
      },
      "title": "Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118657",
    "datePublished": "2026-10-28T20:14:09.883Z",
    "dateReserved": "2026-10-28T17:25:37.561Z",
    "dateUpdated": "2026-10-28T20:14:09.883Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}