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CVE-2025-5455

Good to know:

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Date: June 2, 2025

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.

Severity Score

Related Resources (3)

https://codereview.qt-project.org/c/qt/qtbase/+/642006
https://nvd.nist.gov/vuln/detail/CVE-2025-5455
https://www.mend.io/vulnerability-database/CVE-2025-5455

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Top Fix

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Upgrade Version

Upgrade to version https://github.com/qt/qtbase.git - v5.15.19;https://github.com/qt/qtbase.git - v6.5.9;https://github.com/qt/qtbase.git - v6.8.4;https://github.com/qt/qtbase.git - v6.9.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): HIGH

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