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VulnerabilityPublished Updated

CVE-2026-107472: Qt6 5compat · An out-of-bounds read vulnerability in the QTextCodec TSCII encoding of the Qt 5

Affects qt6-5compatSource GCVE Database

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Authoritative record:CVE-2026-107472· Medium 4.3

Not known to be exploited · CVSS 4.3 Medium.

Data as of 5 Nov 2026, 12:35 UTC

CVSS 4.0 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Qt)CVSS 4.04.3
CVSS:4.0/AV:L/AC:L/AT:N/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 27 Oct 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 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10qt6-5compatpkg:deb/ubuntu/qt6-5compat?arch=source&distro=stonkingOther threatsAffected
  • 6.10.2-1 – 6.11.2-1
4 affected builds
Fixed in–
Ubuntu 26.04 LTSqt6-5compatpkg:deb/ubuntu/qt6-5compat?arch=source&distro=resoluteOther threatsAffected
  • 6.9.2-1 – 6.10.2-1
4 affected builds
Fixed in–
Ubuntu 24.04 LTSqt6-5compatpkg:deb/ubuntu/qt6-5compat?arch=source&distro=nobleOther threatsAffected
  • 6.4.2-3 – 6.4.2-4build3
5 affected builds
Fixed in–
Ubuntu 22.04 LTSqt6-5compatpkg:deb/ubuntu/qt6-5compat?arch=source&distro=jammyOther threatsAffected
  • =6.2.2-5
  • =6.2.4-1
Fixed in–

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

Description

An out-of-bounds read vulnerability in the QTextCodec TSCII encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Applications that convert text to the TSCII encoding through QTextCodec may read memory outside the input buffer, which can cause the application to crash or misinterpret the data.

References

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