CVE-2026-107590
Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt
An out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Under certain conditions, encoding text with QTextCodec may write outside an internal buffer. This can cause the application to crash and may affect data integrity.
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; < 4.5.0 (unaffected, python) ≥ 4.5.0; ≤ 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 / 1.9 low |
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R: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-2026-107590:CNA: Qt · vendor-advisory
- https://codereview.qt-project.org/c/qt/qt5compat/+/762752CNA: Qt · patch
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