{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.4.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e88e762b9995a2acb014b6d7ac6e334e2288cd89"
            },
            {
              "fixed": "04dd4e7754f61768fddccacc79057e416f13e6bf"
            }
          ],
          "repo": "https://github.com/gofiber/fiber",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gv83-gqw6-9j2c"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-319"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53624.json"
  },
  "details": "Fiber is an Express inspired web framework written in Go. Prior to 3.4.0, the helmet middleware in middleware/helmet/helmet.go never sets the Strict-Transport-Security response header even when HSTSMaxAge is configured because it checks c.Protocol() for https instead of c.Scheme(). This issue is fixed in version 3.4.0.",
  "id": "CVE-2026-53624",
  "modified": "2026-08-12T03:51:35.872638403Z",
  "published": "2026-07-08T19:32:08.191Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gofiber/fiber/releases/tag/v3.4.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53624.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-gv83-gqw6-9j2c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53624"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gofiber/fiber/commit/04dd4e7754f61768fddccacc79057e416f13e6bf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gofiber/fiber/pull/4389"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Fiber: HSTS header never set in helmet middleware due to incorrect protocol check"
}