{"id":"CVE-2026-118658","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-118658","summary":"Echo is a Go web framework. Prior to 4.15.2 and 5.1.1, Context.Scheme returns values from X-Forwarded-Proto, X-Forwarded-Protocol, or X-Url-Scheme without validating that they are supported…","details":"Echo is a Go web framework. Prior to 4.15.2 and 5.1.1, Context.Scheme returns values from X-Forwarded-Proto, X-Forwarded-Protocol, or X-Url-Scheme without validating that they are supported web schemes. WWWRedirect and NonWWWRedirect use that value to construct a Location header, so an attacker controlling a forwarded scheme header can cause a redirect to use an arbitrary URI scheme. Exploitation requires an affected redirect middleware and user interaction with the response; the HTTPS-specific redirect variants hardcode HTTPS and are unaffected. This issue is fixed in 4.15.2 and 5.1.1.","published":"2026-10-28T21:16:55.827","modified":"2026-10-28T21:16:55.827","cvss":{"score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181","label":"labstack/echo@ca4f38a"},"references":[{"type":"WEB","url":"https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181"},{"type":"WEB","url":"https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df"},{"type":"WEB","url":"https://github.com/labstack/echo/releases/tag/v4.15.2"},{"type":"WEB","url":"https://github.com/labstack/echo/releases/tag/v5.1.1"},{"type":"WEB","url":"https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T21:16:55.827"}}