Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M
CVE-2026-118658Echo: Arbitrary Scheme Injection in WWWRedirect/NonWWWRedirect Middlewares via X-Forwarded-Proto
Medium 4.7
In plain English
A medium-severity open redirect in echo from labstack. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Echo is a Go web framework. Prior to 4.15.2 and 5.1.1, Context.Scheme returns values from X-Forwarded-Proto, X-Forwarded-Protocol, or X-Url-Scheme without validating that they are supported web schemes. WWWRedirect and NonWWWRedirect use that value to construct a Location header, so an attacker controlling a forwarded scheme header can cause a redirect to use an arbitrary URI scheme. Exploitation requires an affected redirect middleware and user interaction with the response; the HTTPS-specific redirect variants hardcode HTTPS and are unaffected. This issue is fixed in 4.15.2 and 5.1.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | golang-github-labstack-echo | no fix listed | DEBIAN-CVE-2026-118658 |
| Debian:13 | golang-github-labstack-echo | no fix listed | DEBIAN-CVE-2026-118658 |
| Debian:14 | golang-github-labstack-echo | no fix listed | DEBIAN-CVE-2026-118658 |
| Go | github.com/labstack/echo/v4 | 4.15.2 | GO-2026-6878 |
| Go | github.com/labstack/echo/v4 | 4.15.2 | GHSA-23wf-92cp-8pcj |
| Go | github.com/labstack/echo/v5 | 5.1.1 | GHSA-23wf-92cp-8pcj |
| Go | github.com/labstack/echo/v5 | 5.1.1 | GO-2026-6878 |
| Ubuntu:22.04:LTS | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118658 |
| Ubuntu:24.04:LTS | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118658 |
| Ubuntu:26.04:LTS | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118658 |
| Ubuntu:26.10 | golang-github-labstack-echo | no fix listed | UBUNTU-CVE-2026-118658 |
| Ubuntu:22.04:LTS | golang-github-labstack-echo.v2 | no fix listed | UBUNTU-CVE-2026-118658 |
| Ubuntu:22.04:LTS | golang-github-labstack-echo.v3 | no fix listed | UBUNTU-CVE-2026-118658 |
Affected products (as reported)
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj x_refsource_CONFIRM
- https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181 x_refsource_MISC
- https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df x_refsource_MISC
- https://github.com/labstack/echo/releases/tag/v4.15.2 x_refsource_MISC
- https://github.com/labstack/echo/releases/tag/v5.1.1 x_refsource_MISC