{"cve":"CVE-2026-118657","nvd":{"published":"2026-10-28T21:16:55.693","modified":"2026-10-28T21:16:55.693","status":"Received","description":"Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Context.Scheme unconditionally trusts forwarded scheme headers from any client. A client that reaches Echo directly over plaintext HTTP can claim an HTTPS scheme and bypass HTTPSRedirect because the request is treated as already secure. Separately, behind a TLS-terminating proxy that passes an attacker-controlled header, a claimed HTTP scheme can suppress the Strict-Transport-Security header even though the browser receives the response over HTTPS. The practical risk is reduced when a trusted proxy overwrites the headers and direct backend access is prevented, but the framework previously had no trusted-source configuration for this decision. This issue is fixed in 4.16.0 and 5.4.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N","score":5.9},"cwes":["CWE-346"],"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-2ffq-g2xg-c22p"],"products":[],"source":"nvd","synced_at":"2026-10-28T21:45:43.571453220+00:00"},"epss":null,"kev":null,"osv":[{"id":"GHSA-2ffq-g2xg-c22p","url":"https://osv.dev/vulnerability/GHSA-2ffq-g2xg-c22p","summary":"Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers","modified":"2026-10-28T21:15:04.156749170Z","packages":[{"ecosystem":"Go","name":"github.com/labstack/echo/v5","purl":"pkg:golang/github.com/labstack/echo/v5","ranges":["<5.4.0"],"fixed":["5.4.0"]},{"ecosystem":"Go","name":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","ranges":["<4.16.0"],"fixed":["4.16.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}