CVE-2026-118655

{
  "id": "CVE-2026-118655",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-28T20:17:22.723",
  "lastModified": "2026-10-29T19:17:18.690",
  "vulnStatus": "Undergoing Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "labstack",
          "product": "echo",
          "versions": [
            {
              "version": ">= 5.0.0, < 5.2.0",
              "status": "affected"
            },
            {
              "version": "< 4.15.3",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-29T18:29:35.386733Z",
          "id": "CVE-2026-118655",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-174"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/labstack/echo/issues/2599",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/labstack/echo/pull/3006",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/labstack/echo/releases/tag/v4.15.3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/labstack/echo/releases/tag/v5.2.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96",
      "source": "[email protected]"
    }
  ]
}