CVE-2026-118657
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
52/100
Published: 2026-10-28
Modified: 2026-10-29
First seen: 2026-10-29
Status: active
Attack Surface
Network
No Auth
Conf. Impact
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
None
UI:
Required
S:
Unchanged
C:
High
I:
Low
A:
None
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.