Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/labstack/echo/commit/ca4f38a474302aabee93c66bdd0052359882e181
- https://github.com/labstack/echo/commit/d1d8ad3f99dd9b80542cd0c357d56a8916c515df
- https://github.com/labstack/echo/releases/tag/v4.15.2
- https://github.com/labstack/echo/releases/tag/v5.1.1
- https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj
FAQ
What is CVE-2026-118658?
CVE-2026-118658 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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 scheme...
How severe is CVE-2026-118658?
CVE-2026-118658 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-118658?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.