CVE-2025-5455 (GCVE-0-2025-5455)

Vulnerability from cvelistv5 – Published: 2025-06-02 08:46 – Updated: 2025-06-02 12:42
VLAI?
Title
Possible denial of service when passing malformed data in a URL to qDecodeDataUrl
Summary
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 ?
8.4 (High)
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
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
The Qt Company Qt Affected: 0 , ≤ 5.15.18 (python)
Affected: 6.0.0 , ≤ 6.5.8 (python)
Unaffected: 6.5.9 (python)
Affected: 6.6.0 , ≤ 6.8.3 (python)
Unaffected: 6.8.4 (python)
Affected: 6.9.0 (python)
Unaffected: 6.9.1 (python)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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