{"id":"CVE-2026-118658","published":"2026-10-28T21:16:55.827","lastModified":"2026-10-28T21:16:55.827","description":"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.","cvssScore":4.7,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-601"],"vendors":[],"products":[],"references":[{"url":"https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181","tags":[]},{"url":"https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df","tags":[]},{"url":"https://github.com/labstack/echo/releases/tag/v4.15.2","tags":[]},{"url":"https://github.com/labstack/echo/releases/tag/v5.1.1","tags":[]},{"url":"https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj","tags":[]}],"exploitRefs":[{"url":"https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181","tags":[]},{"url":"https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df","tags":[]},{"url":"https://github.com/labstack/echo/releases/tag/v4.15.2","tags":[]},{"url":"https://github.com/labstack/echo/releases/tag/v5.1.1","tags":[]},{"url":"https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj","tags":[]}],"hasPoc":true,"ai":null}