CVE-2026-35217

CVE-2026-35217 affects NanoMQ (MQTT v5) where a SUBSCRIBE packet can be processed even when the final 1-byte Subscription Options field is missing. A specific packet-length construction reveals two manifestations of a single parsing defect: (1) the broker may accept the malformed subscription and...

PT-2026-61649

NanoMQ contains a protocol-semantics flaw in its MQTT v5 SUBSCRIBE handling: if a subscription entry is missing the final 1-byte Subscription Options field, the broker may still accept the malformed packet and install the subscription into internal broker state. Under a specific packet-length...

CVE-2026-35217: Out-of-bounds Read

NanoMQ contains a protocol-semantics flaw in its MQTT v5 SUBSCRIBE handling: if a subscription entry is missing the final 1-byte Subscription Options field, the broker may still accept the malformed packet and install the subscription into internal broker state. Under a specific packet-length...

BIT-NATS-2026-58214 NATS Server: MQTT subscribe ACL bypass via $MQTT.deliver.pubrel prefix (incomplete fix for CVE-2026-33217)

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protoc...

BIT-NATS-2026-58209 NATS Server: MQTT retained and QoS replay bypass subscribe deny filters

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these...

PT-2026-58915

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these...

NATS Server: MQTT retained and QoS replay bypass subscribe deny filters

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NATS Server: Subscribe Authz Bypass via Wildcard-Overlap

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NATS Server: Queue Subscribe Authz Bypass

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MQTT Broker Identify

Detect MQTT brokers and test anonymous subscribe access on TCP 1883. !/usr/bin/env python3 -- coding: utf-8 -- """Identify exposed MQTT brokers and anonymous access.""" from future import annotations import json from kittysploit import from lib.protocols.ics.icsscannerclient import Icsscannerclie...

MQTT TLS Broker Detection

Detects MQTTS brokers and anonymous subscribe access on TCP 8883. !/usr/bin/env python3 -- coding: utf-8 -- """Detect MQTT brokers over TLS on port 8883.""" from kittysploit import from lib.protocols.ics.icsscannerclient import Icsscannerclient from lib.scanner.mqtt.detectors import...

EUVD-2026-42804

The Newsletter, SMTP, Email marketing and Subscribe forms by Brevo formely Sendinblue plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the page parameter in all versions up to, and including, 3.1.77 due to insufficient input sanitization and output escaping. This makes it...

Incorrect Authorization

Overview github.com/nats-io/nats-server/server is an A simple, secure and performant communications system for digital systems, services and devices. Affected versions of this package are vulnerable to Incorrect Authorization in the subscribe process. An attacker can gain unauthorized access to...

Incorrect Authorization

Overview github.com/nats-io/nats-server/v2/server is an A simple, secure and performant communications system for digital systems, services and devices. Affected versions of this package are vulnerable to Incorrect Authorization in the subscribe process. An attacker can gain unauthorized access t...

Incorrect Authorization

Overview github.com/nats-io/nats-server/server is an A simple, secure and performant communications system for digital systems, services and devices. Affected versions of this package are vulnerable to Incorrect Authorization in the MQTT retained message delivery and QoS1+ durable replay process...

Injection

Overview github.com/nats-io/nats-server/server is an A simple, secure and performant communications system for digital systems, services and devices. Affected versions of this package are vulnerable to Injection in the MQTT SUBSCRIBE handling, which forwards protocol control characters from...

CVE-2026-58214

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protoc...

CVE-2026-58209

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these...

AZL-92256 CVE-2026-58209 affecting package telegraf for versions less than 1.31.0-27

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these...

CVE-2026-58209 NATS Server: MQTT retained and QoS replay bypass subscribe deny filters

NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, MQTT retained message delivery and QoS1+ durable replay could deliver messages whose original topics matched a subscriber configured subscribe deny rule because these...