Description
Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, Echo's static file handlers can normalize dot segments after route matching and serve a file through a public static route even though the corresponding direct path is protected by route-level middleware. An unauthenticated attacker can read files that an application intended to protect with route-level middleware, when those files are also reachable through a static filesystem mount after path normalization. This vulnerability is the result of an incomplete fix for CVE-2026-55677. This issue is fixed in 4.16.0 and 5.4.0.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
labstack echo
< 4.16.0affected>= 5.0.0, < 5.4.0affected
References
- https://github.com/labstack/echo/security/advisories/GHSA-3pmx-cf9f-34xr ↗
- https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1 ↗
- https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af ↗
- https://github.com/labstack/echo/releases/tag/v4.16.0 ↗
- https://github.com/labstack/echo/releases/tag/v5.4.0 ↗