---
id: CVE-2026-78253
title: >-
  Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt
  allows attackers to cause a denial of service (application crash via stack
  exhaustion) via a crafted XML document.
summary: >-
  Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt
  allows attackers to cause a denial of service (application crash via stack
  exhaustion) via a crafted XML document.
severity: low
cvss: 2.3
cvssVector: >-
  CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:N/R:U/RE:L/U:Green
cwe:
  - CWE-674
  - CWE-776
vendor: qt
product: qt
affected:
  - qt >= 5.0.0 <= 6.8.8
  - qt >= 6.9.0 <= 6.11.1
patched:
  - hardened_images
published: '2026-09-23'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:08:22.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78253'
references:
  - url: 'https://codereview.qt-project.org/c/qt/qtbase/+/754345'
    label: a59d8014-47c4-4630-ab43-e1b13cbe58e3
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78253.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-78253'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2539372'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-78253'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78253'
  - url: 'https://access.redhat.com/errata/RHSA-2026:59393'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00253
epssPercentile: 0.14931
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T14:35:55.687793Z'
cvssSource: cna
scores:
  cna: 2.3
  vendor: 4.7
ingestedAt: '2026-09-23T12:24:04.183Z'
---

## Overview

Uncontrolled recursion in QXmlStreamReader::readElementText() in Qt Group Qt allows attackers to cause a denial of service (application crash via stack exhaustion) via a crafted XML document.

## Remediation

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

## Vendor advisories

- **RHSA-2026:59393** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59393)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78253.json)