CVE-2026-103645
Integer overflow vulnerability in QTextCodec fromUnicode() and toUnicode() impacts Qt
Description
An integer overflow vulnerability in the Qt QTextCodec fromUnicode() and toUnicode() functionality of the Qt 5 Core Compatibility APIs module (Qt 6) and the Qt Core module (Qt 5). Only builds where Qt is compiled with ICU support are affected.
INFO
Published Date :
Nov. 13, 2026, 9:36 a.m.
Last Modified :
Nov. 13, 2026, 9:36 a.m.
Remotely Exploit :
No
Source :
Qt
Affected Products
The following products are affected by CVE-2026-103645
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | a59d8014-47c4-4630-ab43-e1b13cbe58e3 |
Solution
- Update Qt 5 Core to the latest version.
- Update Qt 6 Core Compatibility APIs to the latest version.
- Ensure builds are not using ICU support if updates are not possible.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-103645 vulnerability anywhere in the article.