Is CVE-2026-107479 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107479 being exploited in the wild.

How severe is CVE-2026-107479?

Informational severity, published 4 November 2026.

Which products and versions are affected?

Qt Framework 5.0.0 to 6.8.8, 6.9.0 to 6.11.2.

Is there a fix for CVE-2026-107479?

Yes: fixed in Qt 6.8.9, Qt 6.11.3, Qt 6.12.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107479 attacked?

It is attacked over the network or with local access, in a software library.

Am I affected by CVE-2026-107479?

Check whether you run Qt Framework at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107479: Qt Framework integer truncation in QTextCodec conversion

CVE-2026-107479 · Severity: info · Published 2026-11-04

Qt Framework is a widely-used cross-platform application development library. An integer truncation vulnerability in the QTextCodec conversion functions can cause applications using this functionality to crash unexpectedly, resulting in application unavailability.

Technologies: Qt Framework. Vendors: Qt.

Quick answers

Is CVE-2026-107479 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107479 being exploited in the wild.
How severe is CVE-2026-107479?: Informational severity, published 4 November 2026.
Which products and versions are affected?: Qt Framework 5.0.0 to 6.8.8, 6.9.0 to 6.11.2.
Is there a fix for CVE-2026-107479?: Yes: fixed in Qt 6.8.9, Qt 6.11.3, Qt 6.12.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107479 attacked?: It is attacked over the network or with local access, in a software library.
Am I affected by CVE-2026-107479?: Check whether you run Qt Framework at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Qt 6.8.9, Qt 6.11.3, Qt 6.12.0

Technical details

An integer truncation vulnerability exists in the QTextCodec conversion functions within the Qt 5 Core Compatibility APIs module. The vulnerability can be triggered during character encoding/decoding operations and leads to a denial of service through application crash. No authentication or user interaction is required beyond normal use of the affected APIs.

Affected products

Qt Qt Framework 5.0.0 to 6.8.8, 6.9.0 to 6.11.2

Timeline

2026-11-04: disclosed

References

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