{"id":"CVE-2026-118657","summary":"Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers","details":"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.","aliases":["GHSA-2ffq-g2xg-c22p"],"modified":"2026-10-29T10:46:01.712264614Z","published":"2026-10-28T20:14:09.883Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-346"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118657.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118657.json"},{"type":"FIX","url":"https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1"},{"type":"FIX","url":"https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af"},{"type":"WEB","url":"https://github.com/labstack/echo/releases/tag/v4.16.0"},{"type":"WEB","url":"https://github.com/labstack/echo/releases/tag/v5.4.0"},{"type":"ADVISORY","url":"https://github.com/labstack/echo/security/advisories/GHSA-2ffq-g2xg-c22p"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118657"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/labstack/echo","events":[{"introduced":"9500f2745481e2dff1313e2e6734c488e80c13fb"},{"fixed":"fc410094b2f3415cf2bf5204082137b205bfd5af"},{"introduced":"0"},{"fixed":"e75c6c6d0c99602336fcf2c6bf6c8475ee160683"},{"fixed":"b838391e2eade87ae7e5a09d7bb5087bec271ec1"}],"database_specific":{"extracted_events":[{"strategy":"StringRangeExpression","range":[{"introduced":"5.0.0"},{"fixed":"5.4.0"}],"source":"AFFECTED_FIELD"},{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"4.16.0"}]},{"range":[{"fixed":"b838391e2eade87ae7e5a09d7bb5087bec271ec1"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"fc410094b2f3415cf2bf5204082137b205bfd5af"}]},{"source":"REFERENCES_TAG","original_tag":"v4.16.0","range":[{"fixed":"e75c6c6d0c99602336fcf2c6bf6c8475ee160683"}]},{"range":[{"fixed":"fc410094b2f3415cf2bf5204082137b205bfd5af"}],"source":"REFERENCES_TAG","original_tag":"v5.4.0"}]}}],"versions":["v5.3.1","v5.3.0","v4.15.4","v5.2.1","v5.2.0","v4.15.3","v4.15.2","v5.1.1","v4.15.1","v5.1.0","v5.0.4","v4.15.0","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v4.14.0","v4.13.4","v4.13.3","v4.13.2","v4.13.1","v4.13.0","v4.12.0","v4.11.4","v4.11.3","v4.11.2","v4.11.1","v4.11.0","v4.10.2","v4.10.1","v4.10.0","v4.9.1","v4.9.0","v4.8.0","v4.7.2","v4.7.1","v4.7.0","v4.6.2","v4.6.1","v4.6.0","v4.5.0","v4.4.0","v4.3.0","v4.2.2","v4.2.1","v4.2.0","v4.1.17","v4.1.16","v4.1.15","v4.1.14","v4.1.13","v4.1.12","v4.1.11","v4.1.10","v4.1.9","v4.1.8","v4.1.7","v4.1.6","v4.1.5","v4.1.4","v4.1.3","v4.1.2","v4.1.1","v4.1.0","v4.0.0","v3.3.10","v3.3.9","v3.3.8-retag","v3.3.7-retag","v3.3.6-retag","v3.3.5-retag","v3.3.4","3.3.4","v3.3.3","3.3.3","3.3.2","v3.3.1","3.3.1","v3.3.0","3.3.0","v3.2.6","3.2.6","v3.2.5","3.2.5","v3.2.4","3.2.4","v3.2.3","3.2.3","v3.3.2","v3.2.2","3.2.2","v3.2.1","v3.2.0","v3.1.0","v3.1.0-rc.1","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v3.0.0-beta.2","v3.0.0-beta.1","v2.0.2","v2.0.1","v2.0.0","v2.0.0-beta.2","v2.0.0-beta.1","v2.0.0-apha.2","v2.0.0-apha1","v2.0.0-apha.1","2.0.0-alpha","v1.3","v1.2.0","v1.1.0","v1.0.0","v0.0.16","v0.0.15","v0.0.14","v0.0.13","v0.0.12","v0.0.11","v0.0.10","v0.0.9","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-118657.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"}]}