CVE-2026-107479
Integer truncation vulnerability in QTextCodec conversion functions impacts Qt Framework
An integer truncation vulnerability in the QTextCodec conversion functions of the Qt 5 Core Compatibility APIs module impacts the Qt Framework. An application using the affected functionality could crash.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: QtAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Qt qt |
≥ 0; < 5.0.0 (unknown, python) ≥ 5.0.0; ≤ 6.8.8 (affected, python) ≥ 6.9.0; ≤ 6.11.2 (affected, python) Other versions: unaffected |
CNA: Qt |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 1.7 low |
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/RE:L/U:Green | CNA: Qt |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107479:CNA: Qt · vendor-advisory
- https://codereview.qt-project.org/c/qt/qt5compat/+/763226CNA: Qt · patch
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