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CVE-2026-118655

Medium

Description

Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0.

SeverityMedium
CVSS5.9
Exploit probability—
ProductGithub.com/labstack/echo/v5
PublishedOct 28, 2026
First seenNov 4, 2026
Weakness typeCWE-174CWE-174

How to fix

Update
  • github.com/labstack/echo/v55.2.0 or later
  • github.com/labstack/echo/v44.15.3 or later

Affected products

ProductAffected versionsFixed in
github.com/labstack/echo/v5Gov < 5.2.05.2.0
github.com/labstack/echo/v4Gov < 4.15.34.15.3

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