CVE WatchOct 28, 2026

CVE-2026-118658

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-

CVSS

4.7

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Oct 28, 2026 · Last modified: Oct 28, 2026 · CWE-601

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

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