CVE-2026-118650
Echo: middleware.Static: `%2F`-encoded path bypasses route/group middleware guarding a statically-served path
HIGH 7.5EPSS 0.4%
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.
- Affected
- labstack · echo
- CVSS v3.1 GITHUB
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.40% chance of exploitation in the next 30 days, 34th percentile
- Published
- 2026-10-28
- Updated
- 2026-11-02
Proof-of-concept exploits (1)
CVE references
- labstack/echo/commit/b838391e2eade87ae7e5a09d7bb5087bec271ec1REFERENCE
- labstack/echo/commit/fc410094b2f3415cf2bf5204082137b205bfd5afREFERENCE
- labstack/echo/releases/tag/v4.16.0REFERENCE
- labstack/echo/releases/tag/v5.4.0REFERENCE
- labstack/echo/security/advisories/GHSA-375p-5qhx-8wq4REFERENCE