CVE-2026-69185High· 7.5▾ TwilightSocket.IO enables bidirectional and low-latency communication for every platform. Prior to 4.2.7, 3.4.5, and 3.3.6, a specially crafted Socket.IO packet can make the server wait for a large number of binary attachments and buffer them, w…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
0.3% → 0.5%
Last analysed / modified upstream
Socket.IO enables bidirectional and low-latency communication for every platform. Prior to 4.2.7, 3.4.5, and 3.3.6, 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 vulnerability is fixed in 4.2.7, 3.4.5, and 3.3.6.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
socket.io-parser >= 4.0.0, < 4.2.7socket.io-parser >= 3.4.0, < 3.4.5socket.io-parser < 3.3.6Patched in:
socket.io-parser 4.2.7socket.io-parser 3.4.5socket.io-parser 3.3.6Connected by shared product, vendor, weakness, or advisory.
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