Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M
CVE-2026-118657Echo: HTTPS Redirect and HSTS Bypass via Unconditional Trust of Forwarded Scheme Headers
Medium 5.9
In plain English
A medium-severity security flaw in echo from labstack. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-github-labstack-echo | no fix listed | DEBIAN-CVE-2026-118657 |
| Debian:13 | golang-github-labstack-echo | no fix listed | DEBIAN-CVE-2026-118657 |
| Debian:14 | golang-github-labstack-echo | no fix listed | DEBIAN-CVE-2026-118657 |
| Go | github.com/labstack/echo/v4 | 4.16.0 | GO-2026-6879 |
| Go | github.com/labstack/echo/v4 | 4.16.0 | GHSA-2ffq-g2xg-c22p |
| Go | github.com/labstack/echo/v5 | 5.4.0 | GHSA-2ffq-g2xg-c22p |
| Go | github.com/labstack/echo/v5 | 5.4.0 | GO-2026-6879 |
| Ubuntu:22.04:LTS | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118657 |
| Ubuntu:24.04:LTS | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118657 |
| Ubuntu:26.04:LTS | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118657 |
| Ubuntu:26.10 | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118657 |
| Ubuntu:22.04:LTS | golang-github-labstack-echo.v2 | no fix listed | UBUNTU-CVE-2026-118657 |
| Ubuntu:22.04:LTS | golang-github-labstack-echo.v3 | no fix listed | UBUNTU-CVE-2026-118657 |
Affected products (as reported)
Weakness: CWE-346 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
References
- https://github.com/labstack/echo/security/advisories/GHSA-2ffq-g2xg-c22p x_refsource_CONFIRM
- https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1 x_refsource_MISC
- https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af x_refsource_MISC
- https://github.com/labstack/echo/releases/tag/v4.16.0 x_refsource_MISC
- https://github.com/labstack/echo/releases/tag/v5.4.0 x_refsource_MISC