> CVE-2026-33215 [MEDIUM]

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PUBLISHED
2026-03-24 21:16
MODIFIED
2026-03-24 21:16
CVSS_SCORE V3
6.5
EPSS (Prob. Exploit)
0.24%
Top 84.3%
DATA SOURCES:
NVD 🔗 2026-03-24 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 OSV 🔗 2026-11-01

> DESCRIPTION

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. The nats-server provides an MQTT client interface. Prior to versions 2.11.15 and 2.12.5, Sessions and Messages can by hijacked via MQTT Client ID malfeasance. Versions 2.11.15 and 2.12.5 patch the issue. No known workarounds are available.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
EXPLOITABILITY
2.2
IMPACT
4.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L
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
High (H)
Conditions spécifiques doivent être réunies 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
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

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

> WEAKNESSES

CWE-287 CWE-488

> CWE DETAILED DESCRIPTIONS

CWE-287: Improper Authentication - When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. | CWE-488: Exposure of Data Element to Wrong Session - The product does not sufficiently enforce boundaries between the states of different sessions, causing data to be provided to, or used by, the wrong session.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Multicluster Global Hub 1.5.4 security update
Multicluster Global Hub v1.5.4 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: Multicluster Global Hub 1.4.5 security update
Multicluster Global Hub v1.4.5 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: Multicluster Global Hub 1.6.2 security update
Multicluster Global Hub v1.6.2 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

NATS is vulnerable to MQTT hijacking via Client ID

AFFECTED PACKAGES:
Unknown / Unknown
144 versions affected
ALIASES:
BIT-nats-2026-33215, GHSA-fcjp-h8cc-6879, GO-2026-4833

> HISTORIQUE DES MODIFICATIONS

Première apparition
24/03/2026 21:16
Source: NVD
📊 ENRICHISSEMENT 01/04/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-287: Improper Authentication - When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. | CWE-488: Exposure of Data Element to ...
Total des modifications: 1 Dernière mise à jour: 7 months ago

> REFERENCES

https://advisories.nats.io/CVE/secnote-2026-06.tx
https://github.com/nats-io/nats-server/security/advisories/GHSA-fcjp-h8cc-6879
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