{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.15.3"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.2.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8800212ad4392d3f5af052f3042aca62cc5911a7"
            },
            {
              "introduced": "9500f2745481e2dff1313e2e6734c488e80c13fb"
            },
            {
              "fixed": "5786024ea4d85c01784796e8aa7aac53e007b39b"
            }
          ],
          "repo": "https://github.com/labstack/echo",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vfp3-v2gw-7wfq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55677.json"
  },
  "details": "Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an attacker to bypass route-level access controls and read static files without authorization. This vulnerability is fixed in 4.15.3 and 5.2.0.",
  "id": "CVE-2026-55677",
  "modified": "2026-07-08T05:37:47.285392851Z",
  "published": "2026-06-26T16:15:55.633Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55677.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55677"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Echo: Encoded slash (%2F) bypasses route-level protection and exposes static files"
}