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CVE-2023-32695

Insufficient validation when decoding a Socket.IO packet

HIGH
7.5
CVSS Score
Published: May 27, 2023 at 03:44 PM UTC
Updated: June 17, 2026 at 05:59 AM UTC
2 products affected across 2 vendorsSocket.io ParserSocket.io-Parser

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

socket.io parser is a socket.io encoder and decoder written in JavaScript complying with version 5 of socket.io-protocol. A specially crafted Socket.IO packet can trigger an uncaught exception on the Socket.IO server, thus killing the Node.js process. A patch has been released in version 4.2.3.

Affected

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

Socket.io Parser· Socketnpm
95%
3.4.0 ≤ v < 3.4.34.0.4 ≤ v < 4.2.3
Affected range stops below 3.4.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.3, so it looks safe — our inference, not a vendor statement
Socket.io-Parser· Socketio
60%
v < 3.4.3v < 4.2.3
Affected range stops below 3.4.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.2.3, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/socketio/socket.io-parser/commit/2dc3c92622dad113b8676be06f23b1ed46b02ced
x_refsource_MISCPatch
Source: [email protected]
https://github.com/socketio/socket.io-parser/commit/3b78117bf6ba7e99d7a5cfc1ba54d0477554a7f3
x_refsource_MISCRelease Notes
Source: [email protected]
https://github.com/socketio/socket.io-parser/releases/tag/4.2.3
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/socketio/socket.io-parser/security/advisories/GHSA-cqmj-92xf-r6r9

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-754

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