VulnerabilityAwaiting Analysis
CVE-2026-69185
This vulnerability is fixed in 4.2.7, 3.4.5, and 3.3.6.
HIGH 7.5EPSS 0.50%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.50%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.50% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-754
- Source
- security-advisories@github.com
References
- https://github.com/socketio/socket.io/commit/7c6ef571a00656718e9e05e3b948fd1758b2a7b4
- https://github.com/socketio/socket.io/commit/9c6323e5cde41bd75df3379b5fc9293664a5f240
- https://github.com/socketio/socket.io/commit/ced94ffa3ac020a8f3c14eb98a3bf34acb14d291
- https://github.com/socketio/socket.io/security/advisories/GHSA-2m8v-j782-fhvr
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.