CVE-2026-59725
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Socket.IO enables bidirectional and low-latency communication for every platform. From 4.1.0 before 6.6.7, Engine.IO protocol v4 polling transport does not properly close the HTTP response for invalid binary POST requests with Content-Type: application/octet-stream, allowing an unauthenticated attacker to exhaust server-side connections and sockets. This issue is fixed in version 6.6.7.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| socketio | socket.io | >= 4.1.0, < 6.6.7 | affected |
Weaknesses
- CWE-404: CWE-404: Improper Resource Shutdown or Release
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/socketio/socket.io/security/advisories/GHSA-r635-g3xr-vw7x
- https://github.com/socketio/socket.io/commit/fc11285e14964c2132d122164bf130c355f60671
- https://github.com/socketio/socket.io/releases/tag/engine.io@6.6.7
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.