CVE-2026-118658

CVSS 4.7 (medium) · published 2026-10-28

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.

Weakness: CWE-601

Source: NVD CVE-2026-118658

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
• https://github.com/labstack/echo/security/advisories/GHSA-23wf-92cp-8pcj

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