FKIE_CVE-2026-118266

Vulnerability from fkie_nvd - Published: 2026-10-28 20:17 - Updated: 2026-10-29 15:15
Severity
5.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Summary
Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Echo's MethodOverride middleware accepts a safe HTTP method as the override target for a POST request. When MethodOverride is registered before CSRF in the post-routing middleware chain, route selection retains the original state-changing POST handler but the override changes the method before CSRF evaluates it, causing both token validation and Sec-Fetch-Site checks to be skipped. A cross-site exploit requires an authenticated victim and an override value that a browser-submitted request can control, such as the form getter used by the advisory reproducer; the default X-HTTP-Method-Override header getter is not settable by a cross-site form. This issue is fixed in 4.16.0 and 5.4.0.
References
security-advisories@github.comhttps://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1
security-advisories@github.comhttps://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af
security-advisories@github.comhttps://github.com/labstack/echo/releases/tag/v4.16.0
security-advisories@github.comhttps://github.com/labstack/echo/releases/tag/v5.4.0
security-advisories@github.comhttps://github.com/labstack/echo/security/advisories/GHSA-r7w9-592q-9vg4
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "echo",
          "vendor": "labstack",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.16.0"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.4.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Echo\u0027s MethodOverride middleware accepts a safe HTTP method as the override target for a POST request. When MethodOverride is registered before CSRF in the post-routing middleware chain, route selection retains the original state-changing POST handler but the override changes the method before CSRF evaluates it, causing both token validation and Sec-Fetch-Site checks to be skipped. A cross-site exploit requires an authenticated victim and an override value that a browser-submitted request can control, such as the form getter used by the advisory reproducer; the default X-HTTP-Method-Override header getter is not settable by a cross-site form. This issue is fixed in 4.16.0 and 5.4.0."
    }
  ],
  "id": "CVE-2026-118266",
  "lastModified": "2026-10-29T15:15:16.507",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-28T20:17:21.577",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/labstack/echo/releases/tag/v4.16.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/labstack/echo/releases/tag/v5.4.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/labstack/echo/security/advisories/GHSA-r7w9-592q-9vg4"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-352"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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