CVE-2026-118654 Echo static file middleware route protection bypass via encoded dot-dot traversal
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-118654?
CVE-2026-118654 is a medium-severity vulnerability in labstack echo, published on 28 Oct 2026.
Official 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.
Weakness: CWE-22
Which versions are affected by CVE-2026-118654?
4 open source packages ship an affected version, including github.com/labstack/echo/v4 and github.com/labstack/echo/v5.
| Package | Affected | Fixed in |
|---|---|---|
github.com/labstack/echo/v4 Go | All versions | 4.16.0 |
github.com/labstack/echo/v4 Go | All versions | 4.16.0 |
github.com/labstack/echo/v5 Go | All versions | 5.4.0 |
github.com/labstack/echo/v5 Go | All versions | 5.4.0 |
How do I fix CVE-2026-118654?
Upgrade github.com/labstack/echo/v4 to 4.16.0 or later.
Is CVE-2026-118654 being exploited?
There is no known exploitation of CVE-2026-118654 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-118654, ECHO-5186-17a4-220d, GHSA-3pmx-cf9f-34xr, UBUNTU-CVE-2026-118654.