CVE-2026-118655
Echo: Static Middleware Double-Unescape Path Traversal
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, middleware.Static can decode an already decoded Request.URL.Path a second time. Double-encoded separators can consequently be reconstructed before filesystem resolution. This can reach a file under a guarded route when the static middleware is registered globally. This issue is fixed in 4.15.3 and 5.2.0.
| CWE | CWE-174 |
| 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
>= 5.0.0, < 5.2.0 < 4.15.3
References
github.com: https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96 github.com: https://github.com/labstack/echo/issues/2599 github.com: https://github.com/labstack/echo/pull/3006 github.com: https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6 github.com: https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725 github.com: https://github.com/labstack/echo/releases/tag/v4.15.3 github.com: https://github.com/labstack/echo/releases/tag/v5.2.0