CVE-2026-55677
Echo is a Go web framework. Prior to 4.15.3 and 5.2.0, Echo's router and static file handler disagree on URL path decoding. The router matches routes using the raw encoded path (preserving %2F as-is), while StaticDirectoryHandler unescapes %2F to / before resolving filesystem paths. This allows an attacker to bypass route-level access controls and read static files without authorization. This vulnerability is fixed in 4.15.3 and 5.2.0.
- CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-vfp3-v2gw-7wfq | Go | github.com/labstack/echo/v5 | <5.2.0 | 5.2.0 |
| GHSA-vfp3-v2gw-7wfq | Go | github.com/labstack/echo/v4 | <4.15.3 | 4.15.3 |
| GHSA-vfp3-v2gw-7wfq | Go | github.com/labstack/echo | <=3.3.10 | no fix published |
| GO-2026-6293 | Go | github.com/labstack/echo/v4 | <4.15.3 | 4.15.3 |
| GO-2026-6293 | Go | github.com/labstack/echo/v5 | <5.2.0 | 5.2.0 |