CVE-2026-33151: fallo de gravedad alta en socketio socket.io
socket.io allows an unbounded number of binary attachments
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 8.7epss 0.5%
Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. Prior to versions 3.3.5, 3.4.4, and 4.2.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, which can be exploited to make the server run out of memory. This issue has been patched in versions 3.3.5, 3.4.4, and 4.2.6.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Productos afectados
socketio · socket.ioCVEs relacionadas — socketio socket.io
En el mismo producto, de las más peligrosas a las menos.
CVE-2024-38355HIGHUnhandled 'error' event in socket.ioEPSS 0.8%CVE-2026-69185HIGHSocket.IO: Zero-attachment Memory ExhaustionEPSS 0.6%CVE-2026-59724HIGHSocket.IO: Engine.IO WebTransport SID DoSEPSS 0.6%CVE-2026-102599HIGHSocket.IO: Engine.IO Protocol Revision Mismatch DoSEPSS 0.6%CVE-2026-102600HIGHSocket.IO: Prototype Pollution via Unsafe Client Session LookupEPSS 0.4%
Referencias
https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faafhttps://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9