{"cve":"CVE-2026-55677","nvd":{"published":"2026-06-26T17:16:34.203","modified":"2026-10-25T17:10:00.197","status":"Deferred","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22"],"references":["https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq","https://github.com/labstack/echo/security/advisories/GHSA-vfp3-v2gw-7wfq"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:06.907763985+00:00"},"epss":{"cve":"CVE-2026-55677","score":0.00431,"percentile":0.3708,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-vfp3-v2gw-7wfq","url":"https://osv.dev/vulnerability/GHSA-vfp3-v2gw-7wfq","summary":"Echo: Encoded slash (%2F) bypasses route-level protection and exposes static files","modified":"2026-09-10T03:51:14.774124457Z","packages":[{"ecosystem":"Go","name":"github.com/labstack/echo/v5","purl":"pkg:golang/github.com/labstack/echo/v5","ranges":["<5.2.0"],"fixed":["5.2.0"]},{"ecosystem":"Go","name":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","ranges":["<4.15.3"],"fixed":["4.15.3"]},{"ecosystem":"Go","name":"github.com/labstack/echo","purl":"pkg:golang/github.com/labstack/echo","ranges":["<=3.3.10"],"fixed":[]}]},{"id":"GO-2026-6293","url":"https://osv.dev/vulnerability/GO-2026-6293","summary":"Encoded slash (%2F) bypasses route-level protection and exposes static files in github.com/labstack/echo/v4 and github.com/labstack/echo/v5","modified":"2026-08-26T15:15:13.215595062Z","packages":[{"ecosystem":"Go","name":"github.com/labstack/echo/v4","purl":"pkg:golang/github.com/labstack/echo/v4","ranges":["<4.15.3"],"fixed":["4.15.3"]},{"ecosystem":"Go","name":"github.com/labstack/echo/v5","purl":"pkg:golang/github.com/labstack/echo/v5","ranges":["<5.2.0"],"fixed":["5.2.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}