CVE catalog

CVE-2026-78253

Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.

[CVE catalog]

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Aug 25, 2026, 11:58:36 AM UTC
Updated: Sep 23, 2026, 3:17:20 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.43% · Oct 25, 2026

Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	qt6-base	sid	`6.11.2+dfsg-7`	fixed
Debian	qt6-base	forky	`6.11.2+dfsg-5`	fixed
Debian	qt6-base	trixie	`6.8.2+dfsg-9+deb13u2`	vulnerable
Debian	qt6-base	bookworm	`6.4.2+dfsg-10`	vulnerable
Debian	qtbase-opensource-src	sid	`5.15.19+dfsg-6`	fixed
Debian	qtbase-opensource-src	forky	`5.15.19+dfsg-5`	vulnerable
Debian	qtbase-opensource-src	trixie	`5.15.15+dfsg-6+deb13u1`	vulnerable
Debian	qtbase-opensource-src	bookworm	`5.15.8+dfsg-11+deb12u3`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	qt6-base	source	sid	`6.11.2+dfsg-5`	not yet assigned	Not reported	Not reported
Debian	qt6-base	source	forky	`6.11.2+dfsg-5`	not yet assigned	Not reported	Not reported
Debian	qt6-base	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	qt6-base	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	qtbase-opensource-src	source	sid	`5.15.19+dfsg-6`	not yet assigned	Not reported	[1150200]
Debian	qtbase-opensource-src	source	forky	`(unfixed)`	not yet assigned	Not reported	[1150200]
Debian	qtbase-opensource-src	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1150200]
Debian	qtbase-opensource-src	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1150200]

[Debian bug #1150200]

Notes

[trixie] qt6-base: Minor issue [bookworm] qt6-base: Minor issue [trixie] qtbase-opensource-src: Minor issue [bookworm] qtbase-opensource-src: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libqt5concurrent5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5core5a]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5dbus5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5gui5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5network5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5opengl5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5opengl5-dev]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5printsupport5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5-ibase]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5-mysql]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5-odbc]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5-psql]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5-sqlite]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5sql5-tds]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5test5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5widgets5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt5xml5]Affected
Source package: [qtbase-opensource-src]
Details (2)
- 5.15.8+dfsg-11+deb12u3 · amd64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
- 5.15.8+dfsg-11+deb12u3 · arm64 · bookworm
  Affected
  nvd · qtbase-opensource-src · debian · bookworm; nvd · qtbase-opensource-src · debian · 12
[libqt6concurrent6]Affected
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Affected
  nvd · qt6-base · debian · bookworm; nvd · qt6-base · debian · 12
- 6.4.2+dfsg-10 · arm64 · bookworm
  Affected
  nvd · qt6-base · debian · bookworm; nvd · qt6-base · debian · 12
[libqt6core6]Affected
Source package: [qt6-base]
Details (2)
- 6.4.2+dfsg-10 · amd64 · bookworm
  Affected
  nvd · qt6-base · debian · bookworm; nvd · qt6-base · debian · 12
- 6.4.2+dfsg-10 · arm64 · bookworm
  Affected
  nvd · qt6-base · debian · bookworm; nvd · qt6-base · debian · 12

Next results

Observed: Oct 23, 2026, 9:37:02 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]