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Fencer Vulns
medium 6.6

CVE-2026-19395 json

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

published 2026-10-05 35 d ago modified 2026-10-06 34 d ago also EUVD-2026-92384

cvss
6.6
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

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.

Patch / fix

  • qt Qt for MCUs 2.12.3
  • qt6 hummingbird 1 6.11.2-1.hum1
  • qt6-filesystem hummingbird 1 6.11.2-1.hum1
  • qt6-rpm-macros hummingbird 1 6.11.2-1.hum1
  • qt6-srpm-macros hummingbird 1 6.11.2-1.hum1
  • qt5 hummingbird 1 5.15.18-3.hum1
  • qt5-filesystem hummingbird 1 5.15.18-3.hum1
  • qt5-rpm-macros hummingbird 1 5.15.18-3.hum1
  • qt5-srpm-macros hummingbird 1 5.15.18-3.hum1

red hat advisories RHSA-2026:57634RHSA-2026:41387

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-19395 updated cvss 7.5

qt-mcu: qt: Denial of Service via empty image tag attribute in styled text

  • Red Hat Hardened Images qt6 6.11.2-1.hum1, qt5 5.15.18-3.hum1, qt6-filesystem 6.11.2-1.hum1, qt6-rpm-macros 6.11.2-1.hum1, qt5-filesystem 5.15.18-3.hum1, qt5-rpm-macros 5.15.18-3.hum1, +2 more
    fixed: vendor fix RHSA-2026:41387
  • Red Hat Enterprise Linux 6 qt, qt-x11, qt-odbc, qt-demos, qt-mysql, qt3-ODBC, +10 more Red Hat Enterprise Linux 7 qt, qt-x11, qt-odbc, qt-qvfb, qt-demos, qt-mysql, +12 more Red Hat Enterprise Linux 8 qt5, qt5-rpm-macros, qt5-srpm-macros
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 qt5, qt5-rpm-macros, qt5-srpm-macros Red Hat Enterprise Linux 10 qt6 6.10.1-1.el10
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
35 d ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 6.6 CVSS: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
CNA 4.0 6.6 CVSS: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

Affected products

  • qt Qt for MCUs

Classification

Weakness
  • CWE-617 Reachable Assertion
  • CWE-230 Improper Handling of Missing Values

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.