CVE Details
Basic Information
| Title | Possible denial of service when passing malformed data in a URL to qDecodeDataUrl |
|---|---|
| Type | cve |
| Published | 2025-06-02T08:46:20.524Z |
| Last Seen |
Product Information
| Vendor | The Qt Company |
|---|---|
| Product | Qt |
| Version | 0 |
CVSS Information
| Base Score | 8.4 (HIGH) |
|---|---|
| Attack Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/R:U/RE:M/U:Clear |
| Confidentiality Impact | |
| Integrity Impact | |
| Availability Impact |
AI Analysis
| AI Description | The vulnerability allows an attacker to cause a denial of service by passing malformed data in a URL to the qDecodeDataUrl() function in QtCore, potentially affecting applications using QTextDocument and QNetworkReply. This can lead to an abort if Qt was built with assertions enabled. |
|---|---|
| AI Severity | High |
| Vendor | The Qt Company |
| Product | Qt |
| Affected Version | 0, 6.0.0, 6.6.0, 6.9.0 |
Additional Information
| CVE List | |
|---|---|
| CWE List | CWE-20 |
| Bulletin Family | |
| Source Data | The Qt Company Qt 0 The Qt Company Qt 6.0.0 The Qt Company Qt 6.6.0 The Qt Company Qt 6.9.0 |
Source Information
| Source Data | The Qt Company Qt 0 The Qt Company Qt 6.0.0 The Qt Company Qt 6.6.0 The Qt Company Qt 6.9.0 |
|---|---|
| Source Link |
Description
An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code.
If the function was called with malformed data, for example, an URL that
contained a “charset” parameter that lacked a value (such as
“data:charset,”), and Qt was built with assertions enabled, then it would hit an assertion, resulting in a denial of service
(abort).
This impacts Qt up to 5.15.18, 6.0.0->6.5.8, 6.6.0->6.8.3 and 6.9.0. This has been fixed in 5.15.19, 6.5.9, 6.8.4 and 6.9.1.
CVSS Score Summary
Base Score: 8.4 (HIGH)