| Name | CVE-2026-33151 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| node-socket.io-parser (PTS) | bullseye | 4.0.2-1 | vulnerable |
| bookworm | 4.2.1+~3.1.0-2 | vulnerable | |
| forky, sid, trixie | 4.2.1+~3.1.0-3 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| node-socket.io-parser | source | (unstable) | (unfixed) |
https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9
Fixed by: https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0dacf78 (main)
Fixed by: https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1aa75d4 (socket.io-parser@3.4.4)
Fixed by: https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc041faaf (socket.io-parser@3.3.5)