{"id":"CVE-2026-118656","revision":"a254bbb0ec19440495121a7fd7480877","records":[{"revision":"a254bbb0ec19440495121a7fd7480877","observedAt":"2026-10-28T21:57:06.789+00:00","statement":{"source":"nvd","id":"CVE-2026-118656","aliases":[],"title":"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 …","description":"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.","state":0,"publishedAt":"2026-10-28T21:16:55.55+00:00","modifiedAt":"2026-10-28T21:16:55.55+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":"MEDIUM"}],"references":["https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1","https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af","https://github.com/labstack/echo/releases/tag/v4.16.0","https://github.com/labstack/echo/releases/tag/v5.4.0","https://github.com/labstack/echo/security/advisories/GHSA-v753-g4cw-jm48"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-118656","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Received","weaknesses":["CWE-601"],"productCriteria":[],"sourceDates":{"published":"2026-10-28T21:16:55.550","lastModified":"2026-10-28T21:16:55.550"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-118656","identifiers":["CVE-2026-118656"]},"retained":false,"historicalAffected":[]}],"coverage":[]}