CVE-2026-16762
Publication date 23 October 2026
Last updated 28 October 2026
Ubuntu priority
Description
An attacker able to supply a crafted XML document to an application using QXmlStreamReader can cause disproportionate CPU consumption during parsing, making the application unresponsive (denial of service). Exploitation requires only that the application parse attacker-influenced XML; no authentication, privileges, or user interaction beyond ingesting the input are needed. There is no loss of confidentiality or integrity — no data disclosure, data modification, or code execution — and the impact is contained to the affected process.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| qtbase-opensource-src-gles | 26.10 stonking |
Needs evaluation
|
| 26.04 LTS resolute |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v4.0
Base score
8.7 · High
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/S:P/AU:Y/R:A/RE:L
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-16762
- https://github.com/qt/qtbase/commit/564db12e40089b946c2feaac2a029a0c56e6e588
- https://github.com/qt/qtbase/commit/cd0f0803955a04b9d7e3a24d4e40f8405df2bba8
- https://wiki.qt.io/list_of_known_vulnerabilities_in_qt_products#cve-2026-16762:
- https://advisory.echohq.com/cve/cve-2026-16762