CVE-2026-118654
Echo static file middleware route protection bypass via encoded dot-dot traversal
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | labstack |
| Product | echo |
| Published | Oct 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
labstack / echo
< 4.16.0 >= 5.0.0, < 5.4.0
References
github.com: https://github.com/labstack/echo/security/advisories/GHSA-3pmx-cf9f-34xr github.com: https://github.com/labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1 github.com: https://github.com/labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5af github.com: https://github.com/labstack/echo/releases/tag/v4.16.0 github.com: https://github.com/labstack/echo/releases/tag/v5.4.0