CVE-2026-101201: CWE-190 Integer Overflow or Wraparound in qt
Description
A malformed header in the binary file fed to QBinaryJson::fromBinaryData() can cause undefined behaviour because of out-of-bounds read.
CVSS v4.0
Score 4.3medium
Affected software
qt
qt
pkg:maven/org.qtproject/qtcpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*cpe:2.3:a:qt:qt5compat:*:*:*:*:*:*:*:*cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper handling of a malformed header in binary data passed to the QBinaryJson::fromBinaryData() function in Qt. Specifically, an integer overflow or wraparound (CWE-190) leads to an out-of-bounds read (CWE-125), causing undefined behavior. The affected versions include Qt versions from 5.0.0 through 6.8.8 and 6.9.0 through 6.11.2. The CVSS 4.0 base score is 4.3, indicating medium severity. There is no indication of known exploits in the wild, and no patch or remediation information is currently provided.
Potential Impact
The vulnerability can cause undefined behavior due to out-of-bounds memory reads when processing malformed binary JSON data. This may lead to application instability or crashes but does not explicitly indicate privilege escalation or remote code execution based on the available data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid processing untrusted binary JSON data with QBinaryJson::fromBinaryData().
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Qt
- Date Reserved
- 2026-09-28T09:34:42.241Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad72af22cdf04f65614b1fa
Added to database: 10/20/2026, 08:48:50 UTC
Last enriched: 10/20/2026, 09:03:43 UTC
Last updated: 10/20/2026, 19:06:08 UTC
Views: 8
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