CVE-2024-38355

Unhandled 'error' event in socket.io

HIGH

7.3

CVSS Score

Published: June 19, 2024 at 07:48 PM UTC

Updated: June 17, 2026 at 07:39 AM UTC

2 products affected across 2 vendorsSocket.IOSocket.io

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Severity

HIGH7.3

Exploit prediction

EPSS 0.8%

SSVC

No known exploit

Description

Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. This issue is fixed by commit `15af22fc22` which has been included in `[email protected]` (released in May 2023). The fix was backported in the 2.x branch as well with commit `d30630ba10`. Users are advised to upgrade. Users unable to upgrade may attach a listener for the "error" event to catch these errors.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Socket.io · Socketnpm

60%

v < 2.5.13.0.0 ≤ v < 4.6.23.0.0

Affected range stops below 2.5.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.6.2, so it looks safe — our inference, not a vendor statement

Socket.IO · Socketio

60%

v < 2.5.1v < 4.6.2

Affected range stops below 2.5.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.6.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_MISC

Source: [email protected]

https://github.com/socketio/socket.io/commit/15af22fc22bc6030fcead322c106f07640336115

x_refsource_MISC

Source: [email protected]

https://github.com/socketio/socket.io/commit/d30630ba10562bf987f4d2b42440fc41a828119c

x_refsource_CONFIRM

Source: [email protected]

https://github.com/socketio/socket.io/security/advisories/GHSA-25hc-qcg6-38wj

Source: af854a3a-2127-422b-91ae-364da2661108

https://www.vicarius.io/vsociety/posts/unhandled-exception-in-socketio-cve-2024-38355

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: LOW
Availability: LOW

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-20CWE-754

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