Vulnerability Description
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 Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq
- https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq
FAQ
What is CVE-2026-55677?
CVE-2026-55677 is a vulnerability with a CVSS score of 7.5 (HIGH). 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),...
How severe is CVE-2026-55677?
CVE-2026-55677 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55677?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.