Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers

影響: go:github.com/labstack/echo/v5 < 5.4.0 → 5.4.0, go:github.com/labstack/echo/v4 < 4.16.0 → 4.16.0

Context.Scheme() unconditionally trusts four client-controlled HTTP headers to determine the request scheme, with no mechanism to configure trusted sources. This allows a remote unauthenticated attacker to bypass HTTPS redirect enforcement and suppress HSTS headers. The trusted headers (checked in this order of precedence): 1. X-Forwarded-Proto 2. X-Forwarded-Protocol 3. X-Forwarded-Ssl 4. X-Url-Scheme Threat model Scenario A — Directly exposed application (vulnerable by default): The Echo appl…

Read on GitHub Advisory Database

On 10/29/2026, 06:04 AM, GitHub Advisory Database published "Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers" (type: Advisory). Severity is "Medium" (medium). Related technologies: Go, GitHub. CVE: CVE-2026-118657.