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Fencer Vulns
high 7.1

CVE-2026-8168 json

Denial-of-service vulnerability in the SVG parser and renderer impacts Qt

published 2026-10-19 21 d ago modified 2026-10-19 20 d ago also EUVD-2026-104329

cvss
7.1
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

Uncontrolled recursion in the SVG parser and renderer of the Qt SVG module (QtSvg) in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted SVG file with deeply nested elements.

Patch / fix

  • qt qt 6.8.9, 6.11.2
  • qt6-svg Debian 14 6.11.2-2

debian advisories DEBIAN-CVE-2026-8168

  • qt6 hummingbird 1 6.11.2-1.1.hum1
  • qt6-filesystem hummingbird 1 6.11.2-1.1.hum1
  • qt6-rpm-macros hummingbird 1 6.11.2-1.1.hum1
  • qt6-srpm-macros hummingbird 1 6.11.2-1.1.hum1

red hat advisories RHSA-2026:80569

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-2026-8168 updated cvss 6.5

qt5-qtsvg: qt6-qtsvg: qt: Denial of Service via deeply nested SVG elements

  • Red Hat Enterprise Linux 7 qt5-qtsvg, qt5-qtsvg-examples Red Hat Enterprise Linux 8 qt5-qtsvg, qt5-qtsvg-examples Red Hat Enterprise Linux 9 qt5-qtsvg, qt5-qtsvg-examples Red Hat Enterprise Linux 10 qt6-qtsvg 6.10.1-1.el10
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Hardened Images qt6 6.11.2-1.1.hum1
    affected: workaround, no fix available
  • Red Hat Hardened Images qt6-qtsvg 6.11.2-1.hum1, qt6-qtsvg-examples 6.11.2-1.hum1
    fixed: vendor fix RHSA-2026:58460
  • Red Hat Hardened Images qt5 5.15.18-3.1.hum1
    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
no
Technical impact
partial
Assessed
21 d ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:X/V:X/RE:X/U:X

Affected products

  • qt qt

Classification

Weakness

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.