---
id: CVE-2026-11573
title: >-
  Uncontrolled recursion (CWE-674) in the QDomDocument/QDomNode serialization
  path of the Qt XML module (QtXml, qtbase)
summary: >-
  Uncontrolled recursion (CWE-674) in the QDomDocument/QDomNode serialization
  path of the Qt XML module (QtXml, qtbase). QDomElementPrivate::save() and
  QDomNodePrivate::save() recurse mutually, consuming one stack frame per level
  of elemen…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-674
  - CWE-776
vendor: qt
product: qt
affected:
  - qt >= 2.2.0 < 6.8.2
published: '2026-09-08'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T10:16:50.500'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-11573'
references:
  - url: 'https://codereview.qt-project.org/c/qt/qtbase/+/606899'
    label: a59d8014-47c4-4630-ab43-e1b13cbe58e3
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11573.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-11573'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2529762'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-11573'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-11573'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T13:43:04.701549Z'
cvssSource: cna
epss: 0.00387
epssPercentile: 0.29936
scores:
  cna: 7.1
  vendor: 7.5
ingestedAt: '2026-09-08T15:33:26.983Z'
---

## Overview

Uncontrolled recursion (CWE-674) in the QDomDocument/QDomNode serialization path of the Qt XML module (QtXml, qtbase). QDomElementPrivate::save() and QDomNodePrivate::save() recurse mutually, consuming one stack frame per level of element nesting with no depth limit, no configurable bound and no error return. A document with deeply nested elements parses successfully but exhausts the call stack and terminates the process when serialized. Reachable via QDomDocument::toByteArray() (Qt 4.0 and later), QDomDocument::toString(), QDomDocument::toCString(), QDomNode::save(), and operator<<(QTextStream&, const QDomNode&). Denial of service only — no code execution and no memory disclosure.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11573.json)