[Announce] Security advisory: CVE-2026-111487: Out-of-bounds write vulnerability in the assimp scene import plugin of Qt3D impacts Qt Framework

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An out-of-bounds write vulnerability in the Qt Framework assimp scene import plugin of the Qt3D module has been discovered and has been assigned the CVE id CVE-2026-111487.

Affected versions: from Qt 5.9.0 to Qt 6.8.9, from Qt 6.9.0 to Qt 6.11.2, from Qt 6.12.0 to Qt 6.12.0

Impact: Importing a specially crafted 3D asset through the affected plugin may cause an application crash (availability) and may potentially affect memory integrity.

CVSS 4.0 Score: 4.3 (MEDIUM)

Vector String: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Amber

Mitigation: Do not import 3D asset files from untrusted sources with the Qt3D assimp scene import plugin.

Solution: Apply the following patches or update to Qt 6.8.10, Qt 6.11.3, Qt 6.12.1, Qt 6.13.0 or later. (Note: these versions have not been released yet.)

Patches:
dev: https://codereview.qt-project.org/c/qt%2Fqt3d/+/777981<https://codereview.qt-project.org/c/qt%2Fqt3d/+/777981?utm_source=hs_email&utm_medium=email&utm_content=148378200&_hsenc=p2ANqtz-_qfhqRu0nSTvRELW4A-c6KrrHrsOlQjXoHKvubwdr0SwHp74aqExj6-EG4MkiFK_kM2nLouQcHTKOzCfZzYpi19s5QoQ&_hsmi=148378200>
Qt 6.12: https://codereview.qt-project.org/c/qt%2Fqt3d/+/778738<https://codereview.qt-project.org/c/qt%2Fqt3d/+/778738?utm_source=hs_email&utm_medium=email&utm_content=148378200&_hsenc=p2ANqtz-_qfhqRu0nSTvRELW4A-c6KrrHrsOlQjXoHKvubwdr0SwHp74aqExj6-EG4MkiFK_kM2nLouQcHTKOzCfZzYpi19s5QoQ&_hsmi=148378200> or https://download.qt.io/official_releases/qt/6.12/CVE-2026-111487-qt3d-6.12-0001.diff
Qt 6.8: https://codereview.qt-project.org/c/qt%2Ftqtc-qt3d/+/778767<https://codereview.qt-project.org/c/qt%2Ftqtc-qt3d/+/778767?utm_source=hs_email&utm_medium=email&utm_content=148378200&_hsenc=p2ANqtz-_qfhqRu0nSTvRELW4A-c6KrrHrsOlQjXoHKvubwdr0SwHp74aqExj6-EG4MkiFK_kM2nLouQcHTKOzCfZzYpi19s5QoQ&_hsmi=148378200> or https://download.qt.io/archive/qt/6.8/CVE-2026-111487-qt3d-6.8-0001.diff


Joni Poikelin
Qt Group

Confidential
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