CVE-2026-118266
Full vulnerability record from the local CVENow database.
Description
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.
View original CVE JSON
{
"id": "CVE-2026-118266",
"sourceIdentifier": "[email protected]",
"published": "2026-10-28T20:17:21.577",
"lastModified": "2026-10-29T15:15:16.507",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "labstack",
"product": "echo",
"versions": [
{
"version": "< 4.16.0",
"status": "affected"
},
{
"version": ">= 5.0.0, < 5.4.0",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 1.6,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-352"
}
]
}
],
"references": [
{
"url": "https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1",
"source": "[email protected]"
},
{
"url": "https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af",
"source": "[email protected]"
},
{
"url": "https://github.com/labstack/echo/releases/tag/v4.16.0",
"source": "[email protected]"
},
{
"url": "https://github.com/labstack/echo/releases/tag/v5.4.0",
"source": "[email protected]"
},
{
"url": "https://github.com/labstack/echo/security/advisories/GHSA-r7w9-592q-9vg4",
"source": "[email protected]"
}
]
}