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No exploitation reportedFix available

CVE-2019-5432

No exploitation reported by the sources we read.

  • Published2019-05-06
  • Fixed in6.1.2 · 5.6.1 · 4.1.3 · 3.5.1
  • WeaknessCWE-125 · CWE-126

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A specifically malformed MQTT Subscribe packet crashes MQTT Brokers using the mqtt-packet module versions < 3.5.1, 4.0.0 - 4.1.3, 5.0.0 - 5.6.1, 6.0.0 - 6.1.2 for decoding.

Timeline

dates in UTC
  1. 2019-05-0617:29CVE publishedNVD

Versions per branch

OSV · NVD
Mqtt-packet project mqtt-packet
BranchAffectedFixed in
6.x≥ 6.0.0, < 6.1.26.1.2
5.x≥ 5.0.0, < 5.6.15.6.1
4.x≥ 4.0.0, < 4.1.34.1.3
3.5< 3.5.13.5.1
4.x≥ 4.0.0, ≤ 4.1.3no fix published
5.x≥ 5.0.0, ≤ 5.6.1no fix published
6.x≥ 6.0.0, ≤ 6.1.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • node-mqtt-packetUbuntu:18.04:LTSall versions · no fixed version listed
  • node-mqtt-packetDebian:14all versions · fixed in 6.0.0-2
  • node-mqtt-packetDebian:13all versions · fixed in 6.0.0-2
  • node-mqtt-packetDebian:12all versions · fixed in 6.0.0-2

Full record on NVD

Fix

  1. Update Mqtt-packet project mqtt-packet to 6.1.2 · 5.6.1 · 4.1.3 · 3.5.1

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-126known since 2026-10-23
  • NVDweakness (CWE)CWE-125read 2026-10-23
  • FIRST EPSSEPSS score1.8 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2019-05-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2019-05-06
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-wv67-9jq7-8r69

Frequently asked questions

What is CVE-2019-5432?

A specifically malformed MQTT Subscribe packet crashes MQTT Brokers using the mqtt-packet module versions < 3.5.1, 4.0.0 - 4.1.3, 5.0.0 - 5.6.1, 6.0.0 - 6.1.2 for decoding.

Is CVE-2019-5432 actively exploited?

Active exploitation of CVE-2019-5432 has not been confirmed. Its EPSS score was 1.8% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-5432?

CVE-2019-5432 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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