Hi,

The following vulnerabilities were published for qt6-base.

All of these are fixed in 6.11.3:

CVE-2026-95620[0]:
| A use-after-free vulnerability in the Qt QNetworkAccessManager
| HTTP/2 client support of the Qt Network module allows a malicious or
| compromised HTTP/2 server to cause the client application to crash,
| affecting availability.

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-95620:
Fixed by: https://github.com/qt/qtbase/commit/c4ae6491d473e36f34840a236c5fd0f4bc800558

CVE-2026-96432[1]:
| A malicious or compromised HTTP/2 server withholding SETTINGS ACK
| can send RST_STREAM on a completed stream, planting a null pointer,
| and then send a PUSH_PROMISE for that stream, causing a null pointer
| dereference in the QNetworkAccessManager class of the Qt Network
| module that crashes the application.

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-96432:
Fixed by: https://github.com/qt/qtbase/commit/156dcb4770d7f4747b973ba509f6df1933f64817 (v6.11.3)

CVE-2026-105923[2]:
| A malicious SVG can trigger an integer overflow which in turn
| triggers a null-pointer dereference in VectorImage QML Type.

https://codereview.qt-project.org/c/qt/qtbase/+/762279
https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-105923:
Fixed by: https://github.com/qt/qtbase/commit/d2129a7f0e1f2ebef3f4897276db9b5b05874d8f

CVE-2026-107157[3]:
| 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.

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107157:
https://codereview.qt-project.org/c/qt/qtbase/+/745719
Fixed by: https://github.com/qt/qtbase/commit/08c5ae85586ef9ef6b3f80f98f367de48c6db3d0 (v6.11.3)


If you fix the vulnerabilities please also make sure to include the
CVE (Common Vulnerabilities & Exposures) ids in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-95620
https://www.cve.org/CVERecord?id=CVE-2026-95620
[1] https://security-tracker.debian.org/tracker/CVE-2026-96432
https://www.cve.org/CVERecord?id=CVE-2026-96432
[2] https://security-tracker.debian.org/tracker/CVE-2026-105923
https://www.cve.org/CVERecord?id=CVE-2026-105923
[3] https://security-tracker.debian.org/tracker/CVE-2026-107157
https://www.cve.org/CVERecord?id=CVE-2026-107157

Please adjust the affected versions in the BTS as needed.