{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-118656", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-28T17:25:37.561Z", "datePublished": "2026-10-28T20:12:13.757Z", "dateUpdated": "2026-10-28T20:12:13.757Z"}, "containers": {"cna": {"title": "Echo: Open Redirect via Control-Character Prefix Defeating sanitizeURI", "problemTypes": [{"descriptions": [{"cweId": "CWE-601", "lang": "en", "description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/labstack/echo/security/advisories/GHSA-v753-g4cw-jm48", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/labstack/echo/security/advisories/GHSA-v753-g4cw-jm48"}, {"name": "https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1"}, {"name": "https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af"}, {"name": "https://github.com/labstack/echo/releases/tag/v4.16.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/releases/tag/v4.16.0"}, {"name": "https://github.com/labstack/echo/releases/tag/v5.4.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/labstack/echo/releases/tag/v5.4.0"}], "affected": [{"vendor": "labstack", "product": "echo", "versions": [{"version": ">= 5.0.0, < 5.4.0", "status": "affected"}, {"version": "< 4.16.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T20:12:13.757Z"}, "descriptions": [{"lang": "en", "value": "Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, sanitizeURI checks only the first two bytes of a redirect target before deciding whether it begins with an absolute-path separator pair. When AddTrailingSlash or RemoveTrailingSlash is configured with a redirect status, a slash, TAB, separator path form can evade the guard, be emitted in the Location header, and be normalized by a browser into an attacker-controlled host. This issue is fixed in 4.16.0 and 5.4.0."}], "source": {"advisory": "GHSA-v753-g4cw-jm48", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "echo", "vendor": "labstack", "versions": [{"status": "affected", "version": ">= 5.0.0, < 5.4.0"}, {"status": "affected", "version": "< 4.16.0"}]}], "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, sanitizeURI checks only the first two bytes of a redirect target before deciding whether it begins with an absolute-path separator pair. When AddTrailingSlash or RemoveTrailingSlash is configured with a redirect status, a slash, TAB, separator path form can evade the guard, be emitted in the Location header, and be normalized by a browser into an attacker-controlled host. This issue is fixed in 4.16.0 and 5.4.0."}], "id": "CVE-2026-118656", "lastModified": "2026-10-28T21:16:55.550", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-28T21:16:55.550", "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-v753-g4cw-jm48"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-10-28T22:15:04.293764+00:00", "updated": "2026-10-28T22:15:04.293771+00:00", "vendors": []}