CVE-2026-118657
Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers
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.
- Affected
- labstack · echo
- CVSS v3.1 GITHUB
- 5.9 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N - EPSS
- 0.13% chance of exploitation in the next 30 days, 3rd percentile
- Published
- 2026-10-28
Proof-of-concept exploits (1)
CVE references
- labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1REFERENCE
- labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5afREFERENCE
- labstack/echo/releases/tag/v4.16.0REFERENCE
- labstack/echo/releases/tag/v5.4.0REFERENCE
- labstack/echo/security/advisories/GHSA-2ffq-g2xg-c22pREFERENCE