socket.io allows an unbounded number of binary attachments
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.5%
exploitation probability
0.5%top 59% of all CVEs
observed exploitation
nono source reports it
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
Affected products
socketio · socket.ioReferences
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