Echo has Open Redirect via Control-Character Prefix Defeating sanitizeURI

影響: go:github.com/labstack/echo/v5 < 5.4.0 → 5.4.0, go:github.com/labstack/echo/v4 < 4.16.0 → 4.16.0

Echo's dedicated open-redirect guard, sanitizeURI, decides whether a redirect target is a local path by inspecting exactly two byte positions: uri[0] and uri[1]. If the value begins with a control character such as a tab or a newline, followed by a separator pair, the guard does not fire and the value is written to the Location header unchanged. Browsers remove tab and newline characters from URLs before parsing them, and treat a backslash as a forward slash for HTTP and HTTPS URLs. A Location…

Read on GitHub Advisory Database

On 10/29/2026, 06:04 AM, GitHub Advisory Database published "Echo has Open Redirect via Control-Character Prefix Defeating sanitizeURI" (type: Advisory). Severity is "Medium" (medium). Related technologies: Go, GitHub. CVE: CVE-2026-118656.