CVE-2026-2222-MQTT-Broker-CONNECT-Packet-Heap-Overflow

CVE-2026-2222 – MQTT 브로커 CONNECT 패킷 힙 오버플로우 프로그램 코드 C + Python // mqttbrokersim.c - Simulated vulnerable MQTT broker include include include struct mqttconnect char protocolname8; uint8t protocollevel; uint8t flags; uint16t keepalive; // remaining length field misinterpreted ; void...

Exploit for Cross-site Scripting in Fabian Online_Reviewer_System

--- CVE-2026-2222 – MQTT Broker CONNECT Packet Heap Overflow...

CVE-2026-54412 MQTT-C Heap Out-of-Bounds Read and Integer Underflow in mqtt_unpack_publish_response()

LiamBindle MQTT-C through version 1.1.6 contains a heap-based out-of-bounds read and integer underflow in the mqttunpackpublishresponse function in src/mqtt.c that allows a remote unauthenticated attacker controlling an MQTT broker - or able to inject MQTT traffic into an unencrypted session - to...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: smb: server: The use of smbdirectsocket.sendio.bcredits has been addressed. It turns out that our code will corrupt the stream of reassabled data transfer messages when we trigger an immediate empty send. To fix this issue, we wi...

curl: MQTT state machine confusion: PINGRESP/DISCONNECT with non-zero remaining_length dispatches to stale nextstate

Summary: In lib/mqtt.c, the state machine in mqttdoing lines 894-911 in curl 8.20.0 does not validate that PINGRESP 0xD0 and DISCONNECT 0xE0 packets have remaininglength == 0 as required by MQTT 3.1.1 spec sections 3.13.1 and 3.14.1. A malicious broker can send a PINGRESP fixed header with non-ze...

Apache ActiveMQ series improper validation of MQTT packets [AMQ-9810]

Overview Apache ActiveMQ series provided by The Apache Software Foundation does not properly validate the remaining length field of MQTT packets, which may lead to integer overflow and misinterpretation of MQTT packets. Integer overflow or wraparound CWE-190 - CVE-2025-66168, CVE-2026-40046 Gai...

BIT-ACTIVEMQ-2026-40046 Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT: Missing fix for CVE-2025-66168: MQTT control packet remaining length field is not properly validated

Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT. The fix for "CVE-2025-66168: MQTT control packet remaining length field is not properly validated" was only applied to 5.19.2 and future 5.19.x releases but was missed for all 6.0.0+...

NanoMQ Buffer Overflow Vulnerability (CNVD-2026-16831)

NanoMQ is a lightweight and fast MQTT Broker for IoT edge platforms. A buffer overflow vulnerability exists in NanoMQ versions prior to 0.24.8. The vulnerability stems from the MQTT-over-WebSocket transport failing to properly validate the receive buffer size when processing MQTT packets with...

Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT vulnerable to Integer Overflow or Wraparound

Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT. The fix for "CVE-2025-66168: MQTT control packet remaining length field is not properly validated" was only applied to 5.19.2 and future 5.19.x releases but was missed for all 6.0.0+...

CVE-2026-40046

An integer overflow or wraparound vulnerability (CWE-190) exists in Apache ActiveMQ , Apache ActiveMQ All , and Apache ActiveMQ MQTT due to improper validation of the remaining length field in MQTT control packets. This occurs because the software fails to restrict the field to the MQTT v3.1.1 sp...

Apache ActiveMQ 输入验证错误漏洞

Apache ActiveMQ is an open-source messaging middleware developed by the Apache Foundation in the United States. It supports Java Message Service, clustering, Spring Framework, etc. There is a vulnerability in input validation of Apache ActiveMQ, which stems from improper validation of the remaini...

CVE-2026-25627

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

CVE-2026-25627

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

CVE-2026-25627

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

CVE-2026-25627 nanomq: OOB Read / Crash (DoS) via Malformed MQTT Remaining Length over WebSocket

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

CVE-2026-25627 nanomq: OOB Read / Crash (DoS) via Malformed MQTT Remaining Length over WebSocket

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

CVE-2026-25627 nanomq: OOB Read / Crash (DoS) via Malformed MQTT Remaining Length over WebSocket

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

CVE-2026-25627

CVE-2026-25627 affects NanoMQ (MQTT broker) where the MQTT-over-WebSocket transport could crash due to an out-of-bounds read when processing an MQTT packet with a deliberately large Remaining Length. The issue arises because the receive path copies Remaining Length bytes without ensuring the sock...

EUVD-2026-17195

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...

PT-2026-29116

NanoMQ MQTT Broker NanoMQ is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path...