CVE-2026-78253 PUBLISHED

Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt

Assigner: Qt
Reserved: 24.08.2026 Published: 23.09.2026 Updated: 23.09.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/RE:L/U:Green
CVSS Score: 2.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	Present	Availability	High	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	qt
Product	qt
Versions	Default: unaffected affected from 5.0.0 to 6.8.8 (incl.) affected from 6.9.0 to 6.11.1 (incl.)

References

dev patch

Problem Types

CWE-674 Uncontrolled Recursion CWE

Impacts

CAPEC-230 Serialized Data with Nested Payloads