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Fencer Intel
high 7.5

CVE-2026-69185 json

Socket.IO: Zero-attachment Memory Exhaustion

published 3mo ago modified 19d ago also EUVD-2026-52410 , GHSA-2m8v-j782-fhvr

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
  • socket socket.io 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

Is CVE-2026-69185 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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
3mo ago

Exploit prediction

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

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 Intel 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.

The maintainers of socketio/socket.io published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.