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CVE PROGRAM SOURCE RECORD8.4 High

CVE-2025-5455

Possible denial of service when passing malformed data in a URL to qDecodeDataUrl

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Status
Published
Published
Updated
Assigning organization
TQtC

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Qt Qt

Default version status: unaffected

  • 0 to ≤ 5.15.18affected
  • 6.0.0 to ≤ 6.5.8affected
  • 6.5.9unaffected
  • 6.6.0 to ≤ 6.8.3affected
  • 6.8.4unaffected
  • 6.9.0affected
  • 6.9.1unaffected

References