CVE-2026-55677
CVE-2026-55677 · Echo: Encoded slash (%2F) bypasses route-level protection and exposes static files
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 7.5 · High · EPSS 0.5%
- Published
- Updated
Stack: system
Affected products and versions
echo
- Versions
- < 4.15.3: Affected
- >= 5.0.0, < 5.2.0: Affected
No fix published
golang-github-labstack-echo Debian:12
- Versions
- 4.11.1-1
- 4.11.1-2
- 4.12.0-1
- 4.2.1-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Debian:13
- Versions
- 4.12.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Debian:14
- Versions
- 4.12.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo.v2 Ubuntu:20.04:LTS
- Versions
- 2.2.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo.v3 Ubuntu:20.04:LTS
- Versions
- 3.3.5-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Ubuntu:22.04:LTS
- Versions
- 4.2.1-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo.v2 Ubuntu:22.04:LTS
- Versions
- 2.2.0-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo.v3 Ubuntu:22.04:LTS
- Versions
- 3.3.10-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Ubuntu:24.04:LTS
- Versions
- 4.11.1-2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Ubuntu:25.10
- Versions
- 4.12.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Ubuntu:26.10
- Versions
- 4.12.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
golang-github-labstack-echo Ubuntu:26.04:LTS
- Versions
- 4.12.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published