CVE-2025-5455

criticalpriority · track · 0EPSS 0.004 · 32 %ileDEEURU

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.38% (32nd) EPSS

CVSS 9.3 · critical

Is it mine?

94 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

9.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.7–9.3

v3.19.3criticalAV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:Hsecondary · FSTEC (BDU) RU

v4.08.4highCVSS: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:Clearsecondary · ENISA EU

v4.08.4highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:U/V:X/RE:M/U:Clearsecondary

v4.05.7mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:U/V:X/RE:M/U:Clearsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20US

affected products (94)

Products and version ranges known to be affected.

Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Open Source QT <5.15.19all versionscert_bundDE
Open Source QT <6.5.9all versionscert_bundDE
Open Source QT <6.8.4all versionscert_bundDE
Open Source QT <6.9.1all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Open Source QT< 5.15.19cert_bundDE
Open Source QT< 6.5.9cert_bundDE
Open Source QT< 6.8.4cert_bundDE
Open Source QT< 6.9.1cert_bundDE
Qt Qt≤ 6.6.0 ≤6.8.3enisa_euvdEU
Qt Qt≤ 6.0.0 ≤6.5.8enisa_euvdEU
Qt Qt≤ 0 ≤5.15.18enisa_euvdEU
Qt Qt≤ 6.9.0enisa_euvdEU
Novell Inc. OpenSUSE Leap≤ 15.6fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.3fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.5fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.4fstec_bduRU

showing 20 of 94

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1220QT: Schwachstelle ermöglicht Denial of ServiceDeutsch2025-06-02csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in QT ausnutzen, um einen Denial of Service Angriff durchzuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2025-06-02modified 2026-07-29

references (6)

External citations — patches, advisories, analysis.

scry

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