Medium severity · published Oct 20, 2026
CVE-2026-101201
QBinaryJson::fromBinaryData() integer overflow leading to OOB read
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
qt · qt
5.0.0 through 6.8.8; 6.9.0 through 6.11.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101201
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101201
codereview.qt-project.org
https://codereview.qt-project.org/c/qt/qt5compat/+/758925
codereview.qt-project.org
https://codereview.qt-project.org/c/qt/qt5compat/+/759230
wiki.qt.io
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-101201
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