> CVE-2026-33151 [HIGH]

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PUBLISHED
2026-03-20 21:17
MODIFIED
2026-03-20 21:17
CVSS_SCORE V3
8.7
EPSS (Prob. Exploit)
0.53%
Top 54.7%
DATA SOURCES:
NVD đź”— 2026-03-20 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-08 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-08

> DESCRIPTION

Socket.IO is an open source, real-time, bidirectional, event-based, communication framework. Prior to versions 3.3.5, 3.4.4, and 4.2.6, 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 issue has been patched in versions 3.3.5, 3.4.4, and 4.2.6.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-20 CWE-754

> CWE DETAILED DESCRIPTIONS

CWE-20: Improper Input Validation - The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. | CWE-754: Improper Check for Unusual or Exceptional Conditions - The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

> GITHUB SECURITY ADVISORY

GHSA-677m-j7p3-52f9 HIGH

socket.io allows an unbounded number of binary attachments

AFFECTED PACKAGES:
NPM / socket.io-parser
>= 4.0.0, < 4.2.6
Fixed in: 4.2.6
NPM / socket.io-parser
>= 3.4.0, < 3.4.4
Fixed in: 3.4.4
NPM / socket.io-parser
< 3.3.5
Fixed in: 3.3.5

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

socket.io allows an unbounded number of binary attachments

AFFECTED PACKAGES:
Unknown / Unknown
55 versions affected
ALIASES:
GHSA-677m-j7p3-52f9

> HISTORIQUE DES MODIFICATIONS

Première apparition
20/03/2026 21:17
Source: NVD
đź“Š ENRICHISSEMENT 01/04/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-20: Improper Input Validation - The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process...
Total des modifications: 1 Dernière mise à jour: 7 months ago

> REFERENCES

https://github.com/socketio/socket.io/commit/719f9ebab0772ffb882bd614b387e585c1a...
https://github.com/socketio/socket.io/commit/9d39f1f080510f036782f2177fac701cc04...
https://github.com/socketio/socket.io/commit/b25738c416c4e32fbff62ee182afa8f6d0d...
https://github.com/socketio/socket.io/security/advisories/GHSA-677m-j7p3-52f9
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