Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls
Critical vendor advisory
Summary
Echo: Rejected WebSocket upgrades can bypass Echo route-level access controls
Why it matters
GitHub has published a reviewed security advisory for github.com/labstack/echo/v4. Prioritize it with other application dependency updates.
Operator check
Check whether github.com/labstack/echo/v4 is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.1.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.