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CVE-2025-5455

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

Published: Jun 2, 2025Updated: Jun 2, 2025 Sources: CVE List NVD BDUCWE-20
9.3CRITICAL
NVD MITRE
EPSS Score
0.3%
Top 77.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LC:NI:HA:H
Exploitability
AV:NAccess Vector
Network
AC:LAccess Complexity
Low
Impact
C:NConfidentiality
None
I:HIntegrity
H
A:HAvailability
H
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Weaknesses

CWE-20

Affected Products

QtThe Qt Company
Library
OSS Libraries / generic-library
Suse Linux Enterprise DesktopNovell Inc.
On-premOS
Operating Systems / linux-distro
SUSE Linux Enterprise Server for SAP ApplicationsNovell Inc.
On-premOS
Operating Systems / linux-distro
OpenSUSE LeapNovell Inc.
On-premOS
Operating Systems / linux-distro
Suse Linux Enterprise ServerNovell Inc.
On-premOS
Operating Systems / linux-distro
the qt companycommercialGBOSS Librariesaka qt, qt for android, qt6 declarative
novell inc.commercialUSOperating Systems
and 6 more affected products View all →

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://codereview.qt-project.org/c/qt/qtbase/+/642006
codereview.qt-project.org
https://codereview.qt-project.org/c/qt/qtbase/+/642006
codereview.qt-project.org
https://access.redhat.com/security/cve/cve-2025-5455
access.redhat.com
and 10 more references View all →

Timeline

Published
Jun 2, 2025
Last Updated
Jun 2, 2025

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