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Fencer Intel
high 7.5

CVE-2015-9541 json

Qt through 5.14 allows an exponential XML entity expansion attack via a crafted SVG document that is mishandled in QXmlStreamReader, a rela…

published 2020-01-24 6 y ago modified 2026-06-17 4 mo ago also EUVD-2015-9381

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
0
none known

Summary

Qt through 5.14 allows an exponential XML entity expansion attack via a crafted SVG document that is mishandled in QXmlStreamReader, a related issue to CVE-2003-1564.

Patch / fix

  • qt qt 5.12.8
  • qtbase-opensource-src Debian 14, Debian 13, Debian 12 5.12.5+dfsg-9

debian advisories DEBIAN-CVE-2015-9541

  • qt5-qtbase RHEL 8 5.12.5-6.el8
  • qt5-qtwebsockets RHEL 8 5.12.5-2.el8
  • qt5-qttools RHEL 8 5.12.5-2.el8
  • qt5-designer RHEL 8 5.12.5-2.el8
  • qt5-doctools RHEL 8 5.12.5-2.el8
  • qt5-linguist RHEL 8 5.12.5-2.el8
  • qt5-assistant RHEL 8 5.12.5-2.el8
  • qt5-qtbase-gui RHEL 8 5.12.5-6.el8

red hat advisories RHSA-2020:4690

  • qt5-qtwebsockets Rocky Linux 8 5.12.5-2.el8

rocky linux advisories RLSA-2020:4690

  • qt5-qtsvg CBL-Mariner 2.0 5.12.11-3

azure linux advisories AZL-6832

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2015-9541 updated cvss 7.5

qt: XML entity expansion vulnerability

  • Red Hat Enterprise Linux 5 qt, qt4 Red Hat Enterprise Linux 6 qt, qt3, qt-x11, qt-odbc, qt-demos, qt-mysql, +10 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 qt, qt-x11, qt-odbc, qt-qvfb, qt-demos, qt-mysql, +6 more
    affected: no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) qt5-qtbase-static 5.12.5-6.el8, qt5-qttools-static 5.12.5-2.el8, qt5-qtbase-debuginfo 5.12.5-6.el8, qt5-qttools-debuginfo 5.12.5-2.el8, qt5-designer-debuginfo 5.12.5-2.el8, qt5-doctools-debuginfo 5.12.5-2.el8, +18 more Red Hat Enterprise Linux AppStream (v. 8) qt5-qtbase 5.12.5-6.el8, qt5-qttools 5.12.5-2.el8, qt5-designer 5.12.5-2.el8, qt5-doctools 5.12.5-2.el8, qt5-linguist 5.12.5-2.el8, qt5-assistant 5.12.5-2.el8, +14 more
    fixed: vendor fix RHSA-2020:4690
  • Red Hat Enterprise Linux 7 qt3, qt3-ODBC, qt3-MySQL, qt3-config, qt3-designer, qt3-PostgreSQL
    not affected: vulnerable code 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

Exploit prediction

2.49% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-776 Improper Restriction of Recursive Entity References in DTDs

References

Sources

Fencer Intel 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.