{"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":"2026-10-29T17:23:39.728Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T15:29:15.771728Z","id":"CVE-2026-118656","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-29T17:23:39.728Z"}}]}}