Out-of-Bounds Read Vulnerability in Qt 5 Compatibility APIs
CVE-2026-107472

4.3MEDIUM

Key Information:

Vendor

Qt

Status
Qt
Vendor
CVE Published:
27 October 2026

What is CVE-2026-107472?

A vulnerability exists in the QTextCodec TSCII encoding implementation within the Qt 5 Compatibility APIs. This flaw allows applications to read memory outside of the designated input buffer when converting text to TSCII encoding. Consequently, affected applications may experience crashes or may misinterpret the encoded data, posing potential risks to data integrity and application performance. Developers are advised to review and patch their applications based on the available updates from the vendor.

Affected Version(s)

Qt 4.0.0 <= 6.8.8

Qt 6.9.0 <= 6.11.2

Qt 0 < 4.0.0

References

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_pr...
vendor-advisory
https://codereview.qt-project.org/c/qt/qt5compat/+/762021
patch

CVSS V4

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.