# CVE-2025-12385: The Qt Company Qt resource exhaustion in Qt Quick Text component

Source: https://junglewise.ai/threats/cve-2025-12385-the-qt-company-qt-resource-exhaustion-in-qt-quick-text-component  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-03. Updated: 2026-07-29  
License: CC BY 4.0 with a link back

CVE-2025-12385 · Severity: info · Published 2025-12-03

A vulnerability exists in the Qt framework, a widely used tool for building cross-platform software interfaces. An attacker could provide specially crafted text containing image tags with extreme dimensions, causing the application to freeze or crash. This results in a denial-of-service, preventing users from accessing the software's functionality.

Vendors: [The Qt Company](https://junglewise.ai/threats/vendors/the-qt-company).

## Quick answers

**Is CVE-2025-12385 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-12385 being exploited in the wild.

**How severe is CVE-2025-12385?** Informational severity, published 3 December 2025.

**Which products and versions are affected?** The Qt Company Qt 5.0.0 - 6.5.10, 6.6.0 - 6.8.5, 6.9.0 - 6.10.0.

**Is there a fix for CVE-2025-12385?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2025-12385 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-12385?** Check whether you run The Qt Company Qt 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.

## Technical details

An 'Allocation of Resources Without Limits or Throttling' vulnerability exists in the Qt Quick Text component. The root cause is improper validation of the 'width' and 'height' attributes within the HTML-style <img> tag. By supplying excessively large values for these attributes, an attacker can trigger excessive memory or CPU allocation, leading to application unresponsiveness (Denial of Service). The vulnerability affects multiple versions of Qt across all supported platforms including Windows, macOS, Linux, and mobile OSs. Fixes have been developed in the qtdeclarative module.

## Affected products

- The Qt Company Qt 5.0.0 - 6.5.10, 6.6.0 - 6.8.5, 6.9.0 - 6.10.0

## Timeline

- 2025-12-03: disclosed

## References

- [https://codereview.qt-project.org/c/qt/qtdeclarative/+/687239](https://codereview.qt-project.org/c/qt/qtdeclarative/+/687239)
- [https://codereview.qt-project.org/c/qt/qtdeclarative/+/687766](https://codereview.qt-project.org/c/qt/qtdeclarative/+/687766)

## Related threats

- [The Qt Company Qt denial of service in Qt Network Schannel support](https://junglewise.ai/threats/cve-2025-6338-the-qt-company-qt-denial-of-service-in-qt-network-schannel-support)