Echo: Static Middleware Double-Unescape Path Traversal (labstack echo)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.30 % · percentile 23 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Awaiting Analysis
Description
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.
Weaknesses (CWE)
- CWE-174 — Double Decoding of the Same Data
References
- https://github.com/labstack/echo/security/advisories/GHSA-xwq5-6cqp-vx96
- https://github.com/labstack/echo/issues/2599
- https://github.com/labstack/echo/pull/3006
- https://github.com/labstack/echo/commit/a9ede66a5a7196411131beb1ee801e75bbaf7ac6
- https://github.com/labstack/echo/commit/c3fa2a27ff92b2b8db360de614f999ef1da24725
- https://github.com/labstack/echo/releases/tag/v4.15.3
- https://github.com/labstack/echo/releases/tag/v5.2.0
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | GitHub_M |
| CVSS 3.1 | MEDIUM 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-xwq5-6cqp-vx96 — Echo has a Static Middleware Double-Unescape Path Traversal
European references
- ENISA EUVD · EUVD-2026-112461
- GCVE · GCVE-0-2026-118655
Affected products
| Product | Versions |
|---|---|
| labstack · echo | affected >= 5.0.0, < 5.2.0 ; affected < 4.15.3 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |