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CVE-2026-55677

Echo: Encoded slash (%2F) bypasses route-level protection and exposes static files PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
labstack / echoaffected < 4.15.3; affected >= 5.0.0, < 5.2.0

CWE

CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.