CVE-2026-118650
Echo: middleware.Static: `%2F`-encoded path bypasses route/group middleware guarding a statically-served path
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, a globally mounted middleware.Static instance can interpret an encoded request path differently from Echo's router because the router matches the still-encoded path while the static handler uses the decoded URL.Path. The advisory demonstrates an encoded slash resolving to a file under the static root through the global static middleware, but the source is internally inconsistent about whether a route or group guard protects the corresponding literal path in that global-mount configuration. This issue is fixed in 4.16.0 and 5.4.0.
| CWE | CWE-177 CWE-863 |
| Vendor | labstack |
| Product | echo |
| Published | Oct 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
labstack / echo
>= 5.0.0, < 5.4.0 < 4.16.0
References
github.com: https://github.com/labstack/echo/security/advisories/GHSA-375p-5qhx-8wq4 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