CVE-2026-78253 | BDVDB-2026-378154 Detail

qtqt

Description#

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.

Impact#

CAPEC-230 Serialized Data with Nested Payloads

Weaknesses#

CWE-674 Uncontrolled Recursion

References#

https://codereview.qt-project.org/c/qt/qtbase/+/754345

Exploit#

No public exploit known

History#

Version 12026-09-23Record published in the CVE List.

Published

Published: 2026-09-23
Last modified: 2026-09-23

Vendor information

Vendor: qt
Product: qt

All qt vulnerabilities

Score

2.3 Low

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 37.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 5.0.0 and <= 6.8.8
Fixed
Not stated
Vulnerable
>= 6.9.0 and <= 6.11.1
Fixed
Not stated

Scoring System

CVSS v4.0

2.3 Low

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

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

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).