Socket.IO: Engine.IO Polling Transport Connection Exhaustion
High-risk advisory
CVE-2026-59725
Summary
Socket.IO: Engine.IO Polling Transport Connection Exhaustion
Why it matters
GitHub has published a reviewed security advisory for engine.io. Prioritize it with other application dependency updates, especially because EPSS places it in the 28% percentile.
Operator check
Check whether engine.io is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.4%; percentile: 28%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.