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Fencer Vulns
high 7.5

CVE-2026-69185 json

Socket.IO: Zero-attachment Memory Exhaustion

published 2026-08-03 3 mo ago modified 2026-10-23 16 d ago also GHSA-2m8v-j782-fhvr , EUVD-2026-52410

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm socket.io-parser 3.3.6, 3.4.5, 4.2.7
  • node-socket.io-parser Debian 14 4.2.4+~3.1.2-1

debian advisories DEBIAN-CVE-2026-69185

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-69185 updated cvss 7.5

socket.io-parser: Socket.IO: Denial of Service via memory exhaustion from crafted packets

  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Hardened Images dotnet8.0 8.0.129-2.hum1, grafana12.4 12.4.6-0.2.hum1, grafana13.1 13.1.1-0.3.hum1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm socket.io-parser
>=4.0.0, <4.2.7
>=3.4.0, <3.4.5
<3.3.6
4.2.7
3.4.5
3.3.6

Affected products

  • socketio socket.io

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-754 Improper Check for Unusual or Exceptional Conditions

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.