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CVE-2026-19395

An empty <img> attribute value in styled text triggers a parser error that halts the device.

6.6 MediumFix available

In Qt for MCUs, a Text element that displays styled text halts the device if an <img> tag in the text contains an attribute with an empty value. The text parser passes the empty value to an internal check that only accepts non-empty values. The check fails and reports an error, and the default error handler halts the device.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.25%Down 0.2 points since Oct 5, 2026
90%50%10%1%

What each source reports

CVE List Score used6.6

An empty <img> attribute value in styled text triggers a parser error that halts the device.

In Qt for MCUs, a Text element that displays styled text halts the device if an <img> tag in the text contains an attribute with an empty value. The text parser passes the empty value to an internal check that only accepts non-empty values. The check fails and reports an error, and the default error handler halts the device.

Record
CVE-2026-19395
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Weakness
CWE-617, CWE-230
Updated
2026-11-02
EUVDEUVD-2026-923846.6

In Qt for MCUs, a Text element that displays styled text halts the device if an <img> tag in the text contains an attribute with an empty value. The text parser passes the empty value to an internal check that only accepts non-empty values. The check fails and reports an error, and the default error handler halts the device.

Record
EUVD-2026-92384
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Updated
2026-11-02
GitHub AdvisoriesGHSA-4vr6-gg46-c2vh6.6

In Qt for MCUs, a Text element that displays styled text halts the device if an <img> tag in the...

In Qt for MCUs, a Text element that displays styled text halts the device if an <img> tag in the text contains an attribute with an empty value. The text parser passes the empty value to an internal check that only accepts non-empty values. The check fails and reports an error, and the default error handler halts the device.

Record
GHSA-4vr6-gg46-c2vh
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X
Weakness
CWE-230
Updated
2026-11-02
NVD6.6

In Qt for MCUs, a Text element that displays styled text halts the device if an <img> tag in the text contains an attribute with an empty value. The text parser passes the empty value to an internal check that only accepts non-empty values. The check fails and reports an error, and the default error handler halts the device.

Record
CVE-2026-19395
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X
Weakness
CWE-230, CWE-617
Updated
2026-11-02
OSVRHSA-2026:413877.5

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:41387
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2026:576347.5

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:57634
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
qt5
Red Hat:hummingbird:1
before 0:5.15.18-3.hum1
0:5.15.18-3.hum1
qt5-filesystem
Red Hat:hummingbird:1
before 0:5.15.18-3.hum1
0:5.15.18-3.hum1
qt5-rpm-macros
Red Hat:hummingbird:1
before 0:5.15.18-3.hum1
0:5.15.18-3.hum1
qt5-srpm-macros
Red Hat:hummingbird:1
before 0:5.15.18-3.hum1
0:5.15.18-3.hum1
qt6
Red Hat:hummingbird:1
before 0:6.11.2-1.hum1
0:6.11.2-1.hum1
qt6-filesystem
Red Hat:hummingbird:1
before 0:6.11.2-1.hum1
0:6.11.2-1.hum1
qt6-rpm-macros
Red Hat:hummingbird:1
before 0:6.11.2-1.hum1
0:6.11.2-1.hum1
qt6-srpm-macros
Red Hat:hummingbird:1
before 0:6.11.2-1.hum1
0:6.11.2-1.hum1

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-19395 is a medium vulnerability (CVSS 6.6) in Qt For Mcus, published October 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. Fixed in qt5 0:5.15.18-3.hum1.

References

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