CVE-2026-69185: Socket.IO enables bidirectional and low-latency communication for every platform

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HIGH 7.5REMOTE

CVE-2026-69185 is a high-severity flaw (CVSS 7.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-20, CWE-754
Published	2026-08-03
Last modified	2026-10-23

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-03 20:17 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

Exact fixes by distribution

npm · socket.io-parser · FIXED · 4.2.7 · vulnerable: >= 4.0.0, < 4.2.7 · source

npm install socket.io-parser@">=4.2.7" npm ls socket.io-parser

Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source

sudo dnf upgrade --advisory=FEDORA-2026-95888f332b

Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source

sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273

Debian 12 · node-socket.io-parser · NO FIX YET

Debian 13 · node-socket.io-parser · NO FIX YET

RHEL AI (RHEL AI) 3 · rhelai3/bootc-cuda-rhel9 · NO FIX YET

RHEL AI (RHEL AI) 3 · rhelai3/bootc-gaudi-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-rocm-rhel9 · NO FIX YET

RHEL AI (RHEL AI) 3 · rhelai3/disk-image-cuda-rhel9 · NO FIX YET

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-69185?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-69185 being exploited?

CVE-2026-69185 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-69185 affect?

CVE-2026-69185 affects affected software. Severity is high (CVSS 7.5). 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, whic

How urgent is CVE-2026-69185?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

References

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