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VulnerabilityPublished

CVE-2026-107457: Memory Corruption Vulnerability

Source GCVE Database

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Authoritative record:CVE-2026-107457· Low 2.3

Not known to be exploited · CVSS 2.3 Low.

Data as of 2 Nov 2026, 13:13 UTC

CVSS 4.0 base score
2.3Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Qt)CVSS 4.02.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Green

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
qtQtAffected
  • >=5.12.0 <=6.8.8
  • >=6.9.0 <=6.11.2
Fixed in–
GitHubqt/qtmqttpkg:github/qt/qtmqttOther threatsAffected
  • >=5.12.0 <=6.8.8
  • >=6.9.0 <=6.11.2
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

A memory corruption vulnerability in the QMqttClient class of the Qt MQTT module. Under certain MQTT 5 connection settings between client and server, QMqttClient may corrupt memory, which can cause the application to crash.

References

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