Open Redirect Affecting github.com/labstack/echo/v4/middleware package, versions <4.16.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Oct 2026
- disclosed28 Oct 2026
- creditzerovulnlabs
Introduced: 28 Oct 2026
NewCVE-2026-118656 Â (opens in a new tab)How to fix?
Upgrade github.com/labstack/echo/v4/middleware to version 4.16.0 or higher.
Overview
github.com/labstack/echo/v4/middleware is a middleware package for echo.
Affected versions of this package are vulnerable to Open Redirect via the sanitizeURI function in the trailing-slash middleware and static directory redirects. An attacker can request a path such as /%09/attacker.example/x/; when a redirect is generated, the decoded tab between the slash separators lets the target pass the fixed-position check unchanged, and the browser strips the tab and navigates to attacker.example. Users who follow the redirect leave the trusted site for an attacker-chosen site.
Workarounds
- Configure the trailing-slash middleware without
RedirectCodeso it rewrites paths internally instead of issuing the vulnerable redirect. - Reject request paths containing control characters before the trailing-slash middleware runs, blocking control-character-prefixed redirect targets.