{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.3.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c7ac00edd19f9669b1aebbec6e229658baaa059e"
            },
            {
              "fixed": "a39a035dee6df089d94f4f78e34dd34dac895aee"
            }
          ],
          "repo": "https://github.com/gofiber/fiber",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-g5vh-55hw-rxm8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-203"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44332.json"
  },
  "details": "Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0.",
  "id": "CVE-2026-44332",
  "modified": "2026-07-12T03:54:55.895777680Z",
  "published": "2026-07-08T19:32:15.113Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gofiber/fiber/releases/tag/v3.3.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44332.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44332"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gofiber/fiber/pull/4245"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Fiber: Username Enumeration via Timing Oracle in BasicAuth Default Authorizer"
}