CVE-2026-107157
Out-of-bounds read vulnerability in QCborValue::fromCbor() impacts Qt Framework
Specially crafted CBOR input passed to QCborValue::fromCbor() in Qt Core can cause an out-of-bounds read, which may crash the application and could expose information.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: QtAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Qt qt Platforms: 64 bit |
≥ 0; < 5.12.0 (unaffected, python) ≥ 5.12.0; ≤ 6.8.8 (affected, python) ≥ 6.9.0; ≤ 6.11.1 (affected, python) Other versions: unaffected |
CNA: Qt |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 2.0 low |
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/RE:L/U:Amber | CNA: Qt |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107157:CNA: Qt · vendor-advisory
- https://codereview.qt-project.org/c/qt/qtbase/+/745719CNA: Qt · patch
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