A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00127.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
qt qt unaffected
Version Status Constraints
5.0.0 affected ≤ 6.8.8
6.9.0 affected ≤ 6.11.2

No data.

No data.

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Project Subscriptions

Vendors Products
Qt Subscribe
Qt Subscribe
Qt5compat Subscribe
Qtbase Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://codereview.qt-project.org/c/qt/qt5compat/+/758925 cve-icon cve-icon cve-icon
https://codereview.qt-project.org/c/qt/qt5compat/+/759230 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-101201 cve-icon
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-101201 cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-101201 cve-icon
History

Tue, 20 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 20 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
Description A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.
Title QBinaryJson::fromBinaryData() integer overflow leading to OOB read
First Time appeared Qt
Qt qt
Qt qt5compat
Qt qtbase
Weaknesses CWE-125
CWE-190
CPEs cpe:2.3:a:qt:qt5compat:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*
Vendors & Products Qt
Qt qt
Qt qt5compat
Qt qtbase
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 4.3, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Amber'}

threat_severity

Moderate

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Qt

Published:

Updated: 2026-10-20T15:56:20.735Z

Reserved: 2026-09-28T09:34:42.241Z

Link: CVE-2026-101201

cve-icon Vulnrichment

Updated: 2026-10-20T15:56:16.621Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T09:17:08.397

Modified: 2026-10-20T19:59:00.607

Link: CVE-2026-101201

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T08:20:38Z

Links: CVE-2026-101201 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T16:30:06Z

Weaknesses