Description
An information disclosure vulnerability in the Qt Framework QWebSocket authentication handling of the Qt WebSockets module.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| qt | Qt Framework | 6.6.0 – < 6.8.10, 6.9.0 – < 6.11.3, 6.12.0 – < 6.12.1 | 6.8.10 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qt6-websockets +1 | No fix yet | — |
| Debian 13 | qt6-websockets +1 | No fix yet | — |
| Debian 12 | qt6-websockets +1 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qt6-websockets +1 | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-websockets +1 | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-websockets +1 | No fix yet | — |
| Ubuntu 22.04 LTS | qt6-websockets +1 | No fix yet | — |
| Ubuntu 20.04 LTS | qtwebsockets-opensource-src | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | qtwebsockets-opensource-src | No fix yet | — |
| Ubuntu 16.04 LTS | qtwebsockets-opensource-src | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qt6-websockets | 6.12.0-2.1 | openSUSE-SU-2026:12492-1 |
Advisories 2
- openSUSE-SU-2026:12492-1 libQt6WebSockets6-6.12.0-2.1 on GA media SUSE / openSUSE Security Updates · Nov 9, 2026
- WID-SEC-2026-4373 QT: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Nov 5, 2026