Description
Resource exhaustion vulnerability in the HTTP request handling of the QHttpServer component of Qt HTTP Server.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| qt | Qt Framework | 6.4.0 – < 6.11.3, 6.12.0 – < 6.12.1 | 6.11.3 |
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-httpserver | 6.11.2-3 | — |
| Debian 13 | qt6-httpserver | No fix yet | — |
| Debian 12 | qt6-httpserver | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qt6-httpserver | No fix yet | — |
| Ubuntu 26.04 LTS | qt6-httpserver | No fix yet | — |
| Ubuntu 24.04 LTS | qt6-httpserver | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qt6-httpserver | 6.12.0-2.1 | openSUSE-SU-2026:12441-1 |
Advisories 2
- openSUSE-SU-2026:12441-1 libQt6HttpServer6-6.12.0-2.1 on GA media SUSE / openSUSE Security Updates · Nov 6, 2026
- WID-SEC-2026-4329 QT: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Nov 4, 2026